CN110224413B - Power transmission and distribution adjusting device, metering method and control method thereof - Google Patents
Power transmission and distribution adjusting device, metering method and control method thereof Download PDFInfo
- Publication number
- CN110224413B CN110224413B CN201910501907.9A CN201910501907A CN110224413B CN 110224413 B CN110224413 B CN 110224413B CN 201910501907 A CN201910501907 A CN 201910501907A CN 110224413 B CN110224413 B CN 110224413B
- Authority
- CN
- China
- Prior art keywords
- phase
- distribution
- power transmission
- power
- balance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009826 distribution Methods 0.000 title claims abstract description 126
- 230000005540 biological transmission Effects 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000001105 regulatory effect Effects 0.000 claims abstract description 59
- 230000004907 flux Effects 0.000 claims abstract description 45
- 230000033228 biological regulation Effects 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000005265 energy consumption Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 230000009123 feedback regulation Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- 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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y02E40/30—Reactive power compensation
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power transmission and distribution regulating device, a metering method and a control method thereof. The power transmission and distribution regulating device comprises a circuit breaker, a low-pass filter, a three-phase electromagnetic balance corrector, a three-phase magnetic flux regulator and a power transmission and distribution regulating and metering controller; the low-pass filter comprises a first alternating current filter reactance and a first alternating current filter capacitor; the three-phase electromagnetic balance corrector comprises a three-phase self-induction coil, a three-phase exchange balance coil and a first three-phase compensation coil; the three-phase magnetic flux regulator comprises a second three-phase compensation coil, a second alternating current filter reactance, a second alternating current filter capacitor, four semiconductor switches and a direct current support capacitor; the first three-phase compensation coil and the second three-phase compensation coil are in magnetic flux coupling; the power transmission and distribution regulation and metering controller controls the circuit breaker, the three-phase electromagnetic balance corrector and the three-phase magnetic flux regulator, so that three-phase impedance balance of the power distribution and utilization network is realized, and voltage balance and current balance are realized. The invention also provides a metering method and a control method of the power transmission and distribution regulating device.
Description
Technical Field
The invention relates to the field of power transmission and distribution equipment, in particular to a power transmission and distribution regulating device, a metering method and a control method thereof.
Background
With the development of industry, various industries have demands for power transmission and distribution and electric transmission, and meanwhile, global requirements for environment are raised, and more environmental protection and energy consumption reduction are required, so that the demands for reducing energy consumption and converting different power transmission and distribution systems are raised. The fields of power transmission and transformation, rail transit, ship and mineral exploitation related independent power station power transmission and distribution, metal smelting, water conservancy, building construction, intelligent building, chemical industry, airport port power transmission and distribution, manufacturing equipment, military and the like all need support of power transformation, especially support of power transformation, and the research, design and manufacturing of high-performance power electronic converters are involved, and the power exchange conversion directly relates to improvement of power saving performance and reliability of a power transmission and distribution system, and is more in demand of cost reduction.
Because the electricity consumption environment is very complex, according to the requirements of power supply of a power grid and power consumption of equipment, the voltage, frequency, power factor and harmonic waves in single-phase power and three-phase power in different power transmission and distribution systems are required to be regulated and controlled.
The invention patent of China with the application publication number of CN105552944A discloses a network system comprising an energy storage and energy router and an energy regulation method, which belong to the application design of a renewable energy source energy control device and the application field of grid-connected technology in a renewable energy source power network, only the grid-connected technology and the energy storage technology in the renewable energy source power network are considered, interconnection and intercommunication among electric energy of different systems in the power energy route are not considered, and the electric energy systems comprise single-phase, three-phase, voltage, current, power factor, frequency, harmonic wave and electric energy conversion efficiency.
The Chinese patent application publication No. CN105610190A discloses a device and a system for comprehensively utilizing renewable energy sources of rail transit vehicles, which provide the functions that power feedback electric energy is converted into direct current and stored on the direct current side, and the interconnection and the intercommunication among electric energy of different systems in electric power energy routing are not involved, and the power transmission and distribution regulation cannot be realized.
The Chinese patent application publication No. CN105264732A discloses a power grouping generating device, a power router and a power network, which are power sources in a power supply network for selecting composite target voltage through a selection switch according to target voltage of electric equipment, are voltage routing devices, cannot meet the conversion of different complex electric energy systems, cannot achieve the absorption and scheduling of feedback electric energy, and cannot achieve the purpose of reducing energy consumption.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a power transmission and distribution regulator, a metering method and a control method thereof.
According to the power transmission and distribution regulating device, the power transmission and distribution regulating device is connected with the low-voltage side of the power supply transformer in three-phase parallel;
The power transmission and distribution regulating device comprises a circuit breaker, a low-pass filter, a three-phase electromagnetic balance corrector, a three-phase magnetic flux regulator and a power transmission and distribution regulating and metering controller; the circuit breaker and the low-pass filter are connected in series with the three-phase electromagnetic balance corrector, and the three-phase magnetic flux regulator and the three-phase electromagnetic balance corrector are coupled through magnetic fluxes;
the low-pass filter comprises a first alternating current filter reactance and a first alternating current filter capacitor which are connected into a low-pass filter structure;
the three-phase electromagnetic balance corrector comprises a three-phase self-induction coil, a three-phase exchange balance coil and a first three-phase compensation coil, wherein the three-phase self-induction coil, the three-phase exchange balance coil and the first three-phase compensation coil are connected in series;
The three-phase magnetic flux regulator comprises a second three-phase compensation coil, a second alternating current filter reactance, a second alternating current filter capacitor, four semiconductor switches and a direct current support capacitor; the first three-phase compensation coil and the second three-phase compensation coil are in magnetic flux coupling; the four semiconductor switches are connected into an H-bridge structure, and the H-bridge structure is connected with the second alternating current filter reactance and the second alternating current filter capacitor; the direct current support capacitor is connected with the H bridge structure in parallel;
the power transmission and distribution regulation and metering controller controls the circuit breaker, the three-phase electromagnetic balance corrector and the three-phase magnetic flux regulator, realizes three-phase impedance balance of power distribution and power utilization network, realizes voltage balance and current balance of three-phase electricity at the power distribution side, and regulates and reduces zero sequence component and negative sequence component at the power distribution side.
The three-phase electromagnetic balance corrector of the power transmission and distribution regulating device can obtain three-phase magnetic potential coupling through exchanging three-phase magnetic circuits in a three-phase power utilization system according to different power utilization loads, so as to realize three-phase electromagnetic balance; the compensation current can be injected through the first three-phase compensation coil, so that magnetic flux adjustment is realized, and three-phase impedance balance of the power distribution and power utilization network is dynamically adjusted in real time; the three-phase magnetic flux regulator regulates the magnetic flux of each phase of coil, compensates and balances the impedance of the power load side, realizes the voltage balance and the current balance of the three-phase power of the power distribution side, realizes the regulation and the reduction of the zero sequence component and the negative sequence component of the power distribution side, compensates and redistributes the three-phase reactive power of the power utilization network, and obtains the optimal energy consumption reduction effect; the four semiconductor switches are connected into an H-bridge structure, and can be controlled to exchange by using pulse width modulation, the alternating current is rectified into direct current to be connected to the direct current supporting capacitor, meanwhile, the direct current is converted into alternating current to pass through the low-pass filter and output to the second three-phase compensation coil, so that the real-time active regulation of magnetic flux is realized, the impedance of the power transmission and distribution network is redistributed, and the effect of dynamically reducing energy consumption is achieved.
Further preferably, the first ac filtering reactance, the three-phase self-inductance coil, the three-phase exchange balance coil, the first three-phase compensation coil, the second three-phase compensation coil and the iron core of the second ac filtering reactance are all made of one or more of laser notched silicon steel sheets, iron-based amorphous iron cores and cobalt-based amorphous iron cores.
Further preferably, parameters of the three-phase switching balance coil and the first three-phase compensation coil are selected as windows according to a capacity of a power supply transformer, an impedance characteristic, a power load fluctuation range, and a three-phase imbalance range.
The invention also provides a metering method of the power transmission and distribution regulating device, which comprises the following steps:
Before the power transmission and distribution regulating device is put into use, characteristic parameters of a power transmission and distribution network under different power utilization loads are collected by utilizing a power transmission and distribution regulating and metering controller, impedance characteristics of the power utilization network under the different power utilization loads are calculated through a parameter estimation method, and an impedance characteristic and an electric energy metering database corresponding to the high voltage side of a power supply transformer are established;
after the power transmission and distribution regulating device is put into use, the electric energy metering of the high-voltage side of the measuring power supply transformer is compared with the impedance characteristic and the electric energy metering database before the power transmission and distribution regulating device is put into use, and the reduced energy consumption is calculated.
Further preferably, the characteristic parameters include phase currents, phase voltages, phase differences in phase currents and voltages, current harmonic distributions of the phases, power factors, and calculated current and voltage imbalance levels and harmonic distributions.
The invention further provides a control method of the power transmission and distribution regulating device, which comprises the following steps:
S1, off-line measurement is carried out to calculate impedance characteristics of a power utilization network under different power utilization loads;
S2, configuring a three-phase exchange balance coil path;
s3, closing the breaker;
s4, dynamically and completely actively adjusting, compensating impedance in a power utilization network, and realizing three-phase complete balanced power supply;
S5, cutting off the setting or power transmission and distribution regulating device according to the fault state;
S6, cutting off the circuit breaker, and closing the power transmission and distribution regulating device.
Further preferably, the S1 includes: in an offline state, acquiring characteristic parameters of a power transmission and distribution network under different power utilization loads by utilizing a power transmission and distribution regulation and metering controller, calculating impedance characteristics of the power utilization network under the different power utilization loads by utilizing a parameter estimation method, and establishing an impedance characteristic and an electric energy metering database corresponding to a high voltage side of a power supply transformer, wherein the characteristic parameters comprise currents of each phase, voltages of each phase, phase differences of the currents and voltages of each phase, current harmonic distribution of each phase, power factors and calculated current and voltage unbalance degree and harmonic distribution;
The step S2 comprises the following steps: according to the current and voltage unbalance degree and harmonic distribution measured in the step S1 and the impedance characteristics of a power utilization network under different power utilization loads, configuring coils of a three-phase electromagnetic balance corrector, performing primary re-matching on the impedance of the power utilization loads, and selecting and configuring three-phase exchange balance coil paths in the three-phase electromagnetic balance corrector by utilizing a power transmission and distribution regulation and metering controller;
the step S4 comprises the following steps: the three-phase magnetic flux regulator is controlled on line by utilizing the power transmission and distribution regulation and metering controller, the impedance which is not completely compensated and corrected by the three-phase electromagnetic balance corrector in the S2 is actively regulated by the magnetic flux of a second three-phase compensation coil in the three-phase magnetic flux regulator, so that impedance feedback regulation is formed, the complete compensation and correction of the three-phase impedance of a power utilization network are realized, and the three-phase complete balance power supply is achieved;
the step S5 comprises the following steps: according to the setting or fault state, the three-phase magnetic flux regulator is closed first, and then the initial state of the coil path of the three-phase electromagnetic balance corrector is restored.
The power transmission and distribution regulating device and the metering method and the control method thereof have the beneficial effects that:
(1) The power transmission and distribution regulating device and the control method thereof can provide active dispatching to regulate the power supply and demand balance for the three-phase impedance matching and the three-phase electromagnetic coupling balance of a power utilization network, improve the use efficiency and dispatching effect of electric power energy sources, achieve the aim of reducing energy consumption, and achieve the power saving rate of 8-30 percent according to different application scenes.
(2) The power transmission and distribution regulating device, the metering method and the control method thereof can carry out route transformation on the power systems of different power transmission and distribution systems, and communicate the power interactive conversion between the power systems of different systems and the electric equipment, thereby realizing the stable operation of the power systems and reducing the power transmission capacity of a single power supply system.
(3) The power transmission and distribution regulating device and the control method thereof improve the stability and the reliability of a power supply system and a power utilization system.
(4) The metering method and the control method of the power transmission and distribution regulating device realize the real-time regulation of active and passive feedback, obtain the optimal effect of reducing the energy consumption, estimate the parameters of the power utilization network by the metering method through the mode identification and the parameter estimation method, and realize the effect evaluation of reducing the energy consumption in real time and the evaluation of economic benefits.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
Fig. 1 is a schematic structural connection diagram of a preferred structure of the power transmission and distribution regulating device of the present invention.
Fig. 2 is a schematic diagram of the structural connection of a preferred structure of the low-pass filter.
Fig. 3 is a schematic diagram of the structural connection of a three-phase electromagnetic balance corrector with a preferred structure of a three-phase flux regulator.
Fig. 4 is a schematic structural connection diagram of a preferred structure of the three-phase flux regulator.
Detailed Description
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts. Therefore, the position and the use state of the device may be changed accordingly. These and other directional terms should not be construed as limiting terms.
The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of methods consistent with some aspects of the disclosure as detailed in the accompanying claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
Please refer to fig. 1-4. Fig. 1 is a schematic structural connection diagram of a preferred structure of the power transmission and distribution regulating device of the present invention. Fig. 2 is a schematic diagram of the structural connection of a preferred structure of the low-pass filter. Fig. 3 is a schematic diagram of the structural connection of a three-phase electromagnetic balance corrector with a preferred structure of a three-phase flux regulator. Fig. 4 is a schematic structural connection diagram of a preferred structure of the three-phase flux regulator.
According to the power transmission and distribution regulating device, the power transmission and distribution regulating device is connected with the low-voltage side of the power supply transformer in three-phase parallel. In fig. 1, a is a low-voltage distribution breaker of a transformer.
The power transmission and distribution regulating device comprises a circuit breaker 1, a low-pass filter 2, a three-phase electromagnetic balance corrector 3, a three-phase magnetic flux regulator 4 and a power transmission and distribution regulating and metering controller; the circuit breaker 1, the low-pass filter 2 and the three-phase electromagnetic balance corrector 3 are connected in series, and the three-phase magnetic flux regulator 4 and the three-phase electromagnetic balance corrector 3 are coupled through magnetic flux.
The low-pass filter 2 comprises a first ac filter reactance 21 and a first ac filter capacitor 22 connected in a low-pass filter configuration.
The three-phase electromagnetic balance corrector 3 includes a three-phase self-inductance coil 31, a three-phase exchange balance coil 32, and a first three-phase compensation coil 33, and the three-phase self-inductance coil 31, the three-phase exchange balance coil 32, and the first three-phase compensation coil 33 are connected in series.
The three-phase magnetic flux regulator 4 comprises a second three-phase compensation coil 41, a second alternating current filter reactance 42, a second alternating current filter capacitor 43, four semiconductor switches 44 and a direct current support capacitor 45; the first three-phase compensation coil 33 and the second three-phase compensation coil 41 are magnetically coupled; the four semiconductor switches 44 are connected into an H-bridge structure, and the H-bridge structure is connected with the second ac filter reactance 42 and the second ac filter capacitor 43; the dc support capacitor 45 is connected in parallel with the H-bridge structure.
The power transmission and distribution regulation and metering controller controls the circuit breaker 1, the three-phase electromagnetic balance corrector 3 and the three-phase magnetic flux regulator 4, realizes three-phase impedance balance of power distribution and power utilization networks, realizes voltage balance and current balance of three-phase electricity at a power distribution side, and regulates and reduces zero sequence components and negative sequence components at the power distribution side.
According to the three-phase electromagnetic balance corrector 3 of the power transmission and distribution regulating device, according to different power loads, three-phase magnetic potential coupling can be obtained by exchanging three-phase magnetic circuits in a three-phase power utilization system, so that three-phase electromagnetic balance is realized; the compensation current can be injected through the first three-phase compensation coil 33, so that the magnetic flux adjustment is realized, and the three-phase impedance balance of the power distribution and power utilization network is dynamically adjusted in real time; the three-phase magnetic flux regulator 4 regulates the magnetic flux of each phase coil, compensates the impedance of the balanced power load side, realizes the voltage balance and the current balance of the three-phase power of the power distribution side, realizes the regulation and the reduction of the zero sequence component and the negative sequence component of the power distribution side, compensates and redistributes the three-phase reactive power of the power utilization network, and obtains the optimal energy consumption reduction effect; the four semiconductor switches 44 are connected to form an H-bridge structure, and may use pulse width modulation to control ac, rectify ac to dc, connect to the dc supporting capacitor 45, and simultaneously convert dc to ac, pass through the low-pass filter 2, and output to the second three-phase compensation coil 41, so as to realize active adjustment of magnetic flux in real time, redistribute impedance of the power transmission and distribution network, and achieve the effect of dynamic reduction of energy consumption.
The iron cores of the first ac filter reactance 21, the three-phase self-inductance coil 31, the three-phase exchange balance coil 32, the first three-phase compensation coil 33, the second three-phase compensation coil 41 and the second ac filter reactance 42 in this embodiment are made of one or more of laser scored silicon steel sheets, iron-based amorphous iron cores and cobalt-based amorphous iron cores.
Preferably, the parameters of the three-phase switching balance coil 32 and the first three-phase compensation coil 33 are selected as windows according to the capacity of the power supply transformer, the impedance characteristics, the fluctuation range of the power load, and the three-phase imbalance range.
The invention relates to a metering method of a power transmission and distribution regulating device, which comprises the following steps:
Step 101, before the power transmission and distribution regulating device is put into use, characteristic parameters of a power transmission and distribution network under different power utilization loads are collected by utilizing a power transmission and distribution regulating and metering controller, impedance characteristics of the power utilization network under the different power utilization loads are calculated through a parameter estimation method, and an impedance characteristic and an electric energy metering database corresponding to the high voltage side of a power supply transformer are established.
The characteristic parameters comprise currents of each phase, voltages of each phase, phase differences of the currents and voltages of each phase, current harmonic distribution of each phase, power factors, and calculated current and voltage unbalance degree and harmonic distribution.
And 102, after the power transmission and distribution regulating device is put into use, comparing the impedance characteristics of the power measurement at the high voltage side of the measuring power supply transformer with the impedance characteristics of the power transmission and distribution regulating device before the power transmission and distribution regulating device is put into use with a power measurement database, and calculating the reduced energy consumption.
The invention relates to a control method of a power transmission and distribution regulating device, which comprises the following steps:
s1, off-line measurement is carried out to calculate impedance characteristics of the power utilization network under different power utilization loads.
Preferably, the S1 includes: and in an offline state, acquiring characteristic parameters of the power transmission and distribution network under different power utilization loads by utilizing a power transmission and distribution regulation and metering controller, calculating impedance characteristics of the power utilization network under different power utilization loads by utilizing a parameter estimation method, and establishing an impedance characteristic and an electric energy metering database corresponding to the high voltage side of the power supply transformer, wherein the characteristic parameters comprise current of each phase, voltage of each phase, phase difference of current and voltage of each phase, current harmonic distribution of each phase, power factor and calculated current and voltage unbalance degree and harmonic distribution.
S2, configuring a three-phase exchange balance coil 32 path.
Preferably, the S2 includes: and (3) configuring coils of the three-phase electromagnetic balance corrector 3 according to the current and voltage unbalance degree and harmonic distribution measured in the step (S1) and the impedance characteristics of the power utilization network under different power utilization loads, performing primary re-matching on the impedance of the power utilization loads, and selecting and configuring paths of the three-phase exchange balance coils 32 in the three-phase electromagnetic balance corrector 3 by utilizing a power transmission and distribution regulation and metering controller.
S3, closing the breaker 1.
S4, dynamically and completely actively adjusting, compensating impedance in a power utilization network, and realizing three-phase complete balanced power supply.
Preferably, the S4 includes: and (3) utilizing the power transmission and distribution regulation and metering controller to control the three-phase magnetic flux regulator 4 on line, and actively regulating the magnetic flux of the second three-phase compensation coil 41 in the three-phase magnetic flux regulator 4 to form impedance feedback regulation, so as to realize complete compensation correction on the three-phase impedance of the power utilization network and achieve three-phase complete balance power supply.
S5, cutting off the setting or power transmission and distribution adjusting device according to the fault state.
Preferably, the S5 includes: according to the setting or the fault state, the three-phase flux regulator 4 is turned off first, and then the coil path initial state of the three-phase electromagnetic balance corrector 3 is restored.
S6, cutting off the circuit breaker 1, and closing the power transmission and distribution regulating device.
The power transmission and distribution regulating device and the metering method and the control method thereof have the beneficial effects that:
(1) The power transmission and distribution regulating device and the control method thereof can provide active dispatching to regulate the power supply and demand balance for the three-phase impedance matching and the three-phase electromagnetic coupling balance of a power utilization network, improve the use efficiency and dispatching effect of electric power energy sources, achieve the aim of reducing energy consumption, and achieve the power saving rate of 8-30 percent according to different application scenes.
(2) The power transmission and distribution regulating device, the metering method and the control method thereof can carry out route transformation on the power systems of different power transmission and distribution systems, and communicate the power interactive conversion between the power systems of different systems and the electric equipment, thereby realizing the stable operation of the power systems and reducing the power transmission capacity of a single power supply system.
(3) The power transmission and distribution regulating device and the control method thereof improve the stability and the reliability of a power supply system and a power utilization system.
(4) The metering method and the control method of the power transmission and distribution regulating device realize the real-time regulation of active and passive feedback, obtain the optimal effect of reducing the energy consumption, estimate the parameters of the power utilization network by the metering method through the mode identification and the parameter estimation method, and realize the effect evaluation of reducing the energy consumption in real time and the evaluation of economic benefits.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (4)
1. A power transmission and distribution adjusting device, characterized in that: the power transmission and distribution regulating device is connected with the low-voltage side of the power supply transformer in three-phase parallel;
The power transmission and distribution regulating device comprises a circuit breaker, a low-pass filter, a three-phase electromagnetic balance corrector, a three-phase magnetic flux regulator and a power transmission and distribution regulating and metering controller; the circuit breaker and the low-pass filter are connected in series with the three-phase electromagnetic balance corrector, and the three-phase magnetic flux regulator and the three-phase electromagnetic balance corrector are coupled through magnetic fluxes;
the low-pass filter comprises a first alternating current filter reactance and a first alternating current filter capacitor which are connected into a low-pass filter structure;
The three-phase electromagnetic balance corrector comprises a three-phase self-induction coil, a three-phase exchange balance coil and a first three-phase compensation coil, wherein the three-phase self-induction coil, the three-phase exchange balance coil and the first three-phase compensation coil are connected in series, and parameters of the three-phase exchange balance coil and the first three-phase compensation coil are selected as windows according to the capacity, impedance characteristics, power load fluctuation range and three-phase imbalance range of a power supply transformer;
The three-phase magnetic flux regulator comprises a second three-phase compensation coil, a second alternating current filter reactance, a second alternating current filter capacitor, four semiconductor switches and a direct current support capacitor; the first three-phase compensation coil and the second three-phase compensation coil are in magnetic flux coupling; the four semiconductor switches are connected into an H-bridge structure, and the H-bridge structure is connected with the second alternating current filter reactance and the second alternating current filter capacitor; the direct current support capacitor is connected with the H bridge structure in parallel;
the power transmission and distribution regulation and metering controller controls the circuit breaker, the three-phase electromagnetic balance corrector and the three-phase magnetic flux regulator, realizes three-phase impedance balance of power distribution and power utilization network, realizes voltage balance and current balance of three-phase electricity at the power distribution side, and regulates and reduces zero sequence component and negative sequence component at the power distribution side.
2. The power transmission and distribution adjusting device according to claim 1, wherein: the first alternating current filter reactance, the three-phase self-inductance coil, the three-phase exchange balance coil, the first three-phase compensation coil, the second three-phase compensation coil and the iron core of the second alternating current filter reactance are made of one or more of laser notched silicon steel sheets, iron-based amorphous iron cores and cobalt-based amorphous iron cores.
3. A metering method for a power transmission and distribution regulating device, which is applied to the power transmission and distribution regulating device according to claim 1, the method comprising:
Before the power transmission and distribution regulating device is put into use, characteristic parameters of a power transmission and distribution network under different power utilization loads are collected by utilizing a power transmission and distribution regulating and metering controller, impedance characteristics of the power utilization network under the different power utilization loads are calculated through a parameter estimation method, and an impedance characteristic and an electric energy metering database corresponding to the high voltage side of a power supply transformer are established, wherein the characteristic parameters comprise current of each phase, voltage of each phase, phase difference of current and voltage of each phase, current harmonic distribution of each phase, power factor and calculated current and voltage unbalance degree and harmonic distribution;
after the power transmission and distribution regulating device is put into use, the electric energy metering of the high-voltage side of the measuring power supply transformer is compared with the impedance characteristic and the electric energy metering database before the power transmission and distribution regulating device is put into use, and the reduced energy consumption is calculated.
4. A power transmission and distribution regulating apparatus control method, applied to the power transmission and distribution regulating apparatus according to claim 1, comprising:
S1, offline measurement is performed to calculate impedance characteristics of a power utilization network under different power utilization loads, wherein the method comprises the following steps: in an offline state, acquiring characteristic parameters of a power transmission and distribution network under different power utilization loads by utilizing a power transmission and distribution regulation and metering controller, calculating impedance characteristics of the power utilization network under the different power utilization loads by utilizing a parameter estimation method, and establishing an impedance characteristic and an electric energy metering database corresponding to a high voltage side of a power supply transformer, wherein the characteristic parameters comprise currents of each phase, voltages of each phase, phase differences of the currents and voltages of each phase, current harmonic distribution of each phase, power factors and calculated current and voltage unbalance degree and harmonic distribution;
S2, configuring a three-phase exchange balance coil path, which comprises the following steps: according to the current and voltage unbalance degree and harmonic distribution measured in the step S1 and the impedance characteristics of a power utilization network under different power utilization loads, configuring coils of a three-phase electromagnetic balance corrector, performing primary re-matching on the impedance of the power utilization loads, and selecting and configuring three-phase exchange balance coil paths in the three-phase electromagnetic balance corrector by utilizing a power transmission and distribution regulation and metering controller;
s3, closing the breaker;
S4, dynamically and completely actively adjusting, compensating impedance in a power utilization network, and realizing three-phase complete balanced power supply, wherein the method comprises the following steps: the three-phase magnetic flux regulator is controlled on line by utilizing the power transmission and distribution regulation and metering controller, the impedance which is not completely compensated and corrected by the three-phase electromagnetic balance corrector in the S2 is actively regulated by the magnetic flux of a second three-phase compensation coil in the three-phase magnetic flux regulator, so that impedance feedback regulation is formed, the complete compensation and correction of the three-phase impedance of a power utilization network are realized, and the three-phase complete balance power supply is achieved;
S5, cutting off the setting or power transmission and distribution adjusting device according to the fault state, wherein the power transmission and distribution adjusting device comprises: according to the set or fault state, firstly closing the three-phase magnetic flux regulator, and then recovering the initial state of the coil path of the three-phase electromagnetic balance corrector;
S6, cutting off the circuit breaker, and closing the power transmission and distribution regulating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501907.9A CN110224413B (en) | 2019-06-11 | 2019-06-11 | Power transmission and distribution adjusting device, metering method and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501907.9A CN110224413B (en) | 2019-06-11 | 2019-06-11 | Power transmission and distribution adjusting device, metering method and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110224413A CN110224413A (en) | 2019-09-10 |
| CN110224413B true CN110224413B (en) | 2024-07-12 |
Family
ID=67816351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910501907.9A Active CN110224413B (en) | 2019-06-11 | 2019-06-11 | Power transmission and distribution adjusting device, metering method and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110224413B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11996236B2 (en) | 2021-05-26 | 2024-05-28 | Eaton Intelligent Power Limited | Current balancing apparatus and methods for parallel connected circuit breakers |
| CN115207915B (en) * | 2022-08-04 | 2023-04-25 | 广东元极科技实业有限公司 | Power transmission and distribution switching type comprehensive adjusting device and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202602541U (en) * | 2012-06-13 | 2012-12-12 | 北京乐普四方方圆科技股份有限公司 | Power transmission energy-saving voltage regulation device |
| CN202633951U (en) * | 2012-05-10 | 2012-12-26 | 广东中钰科技有限公司 | Dynamic reactive power compensator based on IGBT high voltage control |
| CN209748202U (en) * | 2019-06-11 | 2019-12-06 | 广东华控电气节能科技有限公司 | Power transmission and distribution adjusting device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101463636B1 (en) * | 2007-02-20 | 2014-11-19 | 에이비비 리미티드 | Flux control system for active voltage conditioning |
| CN201146390Y (en) * | 2007-07-19 | 2008-11-05 | 襄樊万洲电气集团有限公司 | Electromagnetic balance electricity economizer |
| CN102955489B (en) * | 2011-08-29 | 2016-02-10 | 上海磐腾机电科技有限公司 | three-phase compensation type voltage stabilizer |
| EP2834896B1 (en) * | 2012-03-01 | 2016-05-25 | General Electric Technology GmbH | Control circuit |
| CN107895950A (en) * | 2017-11-25 | 2018-04-10 | 益阳昱丰电气有限公司 | A kind of mixing applied to low-voltage, high-current senses filtering system |
-
2019
- 2019-06-11 CN CN201910501907.9A patent/CN110224413B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202633951U (en) * | 2012-05-10 | 2012-12-26 | 广东中钰科技有限公司 | Dynamic reactive power compensator based on IGBT high voltage control |
| CN202602541U (en) * | 2012-06-13 | 2012-12-12 | 北京乐普四方方圆科技股份有限公司 | Power transmission energy-saving voltage regulation device |
| CN209748202U (en) * | 2019-06-11 | 2019-12-06 | 广东华控电气节能科技有限公司 | Power transmission and distribution adjusting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110224413A (en) | 2019-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Brandao et al. | Centralized control of distributed single-phase inverters arbitrarily connected to three-phase four-wire microgrids | |
| He et al. | An islanding microgrid power sharing approach using enhanced virtual impedance control scheme | |
| JP2020145921A (en) | Power distribution network and processing method | |
| JP7036513B2 (en) | Power supply system and method | |
| Lee et al. | Observer-based control methods for combined source-voltage harmonics and unbalance disturbances in PWM voltage-source converters | |
| CN104541428A (en) | Control method, control device and mobile electric power storage apparatus | |
| Illindala et al. | Control of distributed generation systems to mitigate load and line imbalances | |
| CN110224413B (en) | Power transmission and distribution adjusting device, metering method and control method thereof | |
| Nagliero et al. | Analysis of a universal inverter working in grid-connected, stand-alone and micro-grid | |
| Moreno et al. | Decoupled PI controllers based on pulse-frequency modulation for current sharing in multi-phase LLC resonant converters | |
| Bhawal et al. | Dynamic Modeling and Closed-Loop Control of a Solid-State Transformer (SST) Based on Series Resonant Converter (SRC) | |
| Liu et al. | A Series-Parallel Transformer-Based WPT System for 400-V and 800-V Electric Vehicles with Z1 or Z2 Class | |
| Wen et al. | DQ impedance specification for balanced three-phase AC distributed power system | |
| CN209748202U (en) | Power transmission and distribution adjusting device | |
| Petrov et al. | Reactive power compensation and high-frequency distortions correction in Metro | |
| Bala et al. | Autonomous power electronic interfaces between microgrids | |
| Ahmadi et al. | Supervisory control of bipolar DC microgrids equipped with three-port multidirectional DC–DC converter for efficiency and system damping optimization | |
| Pirouz et al. | Extended modular multilevel converters suitable for medium-voltage and large-current STATCOM applications | |
| Martin-Arnedo et al. | Development and testing of a distribution electronic power transformer model | |
| Govind et al. | An enhanced universal droop control for load sharing in ac microgrid for different load condition | |
| Buticchi et al. | Current and Voltage Model Predictive Control for a Three-Stage Smart Transformer | |
| Takasu et al. | Simultaneous control of efficiency and power in a WPT system using position information between transmission and reception coils | |
| CN115207915B (en) | Power transmission and distribution switching type comprehensive adjusting device and control method thereof | |
| Qiu et al. | The Duality Droop Control for Grid-Tied Cascaded Microinverter | |
| Lei et al. | Exploration of a Modular Multilevel Converter for Direct AC-AC Conversion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200115 Address after: Room 301, unit 2, building 19, gate 19, Yuannan street, Xinshi District, Baoding City, Hebei Province 071000 Applicant after: Li Yang Applicant after: Li Huanyang Address before: 510000 Office Building No. 383, North Panyu Avenue, Nancun Town, Panyu District, Guangzhou City, Guangdong Province, 5, 1006 (office use only) Applicant before: Guangdong Huacon Electric Energy Saving Technology Co.,Ltd. |
|
| GR01 | Patent grant |