CN104882894A - Reactive compensation controller based on dynamic phase-splitting compensation and control method thereof - Google Patents
Reactive compensation controller based on dynamic phase-splitting compensation and control method thereof Download PDFInfo
- Publication number
- CN104882894A CN104882894A CN201510337307.5A CN201510337307A CN104882894A CN 104882894 A CN104882894 A CN 104882894A CN 201510337307 A CN201510337307 A CN 201510337307A CN 104882894 A CN104882894 A CN 104882894A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- phase
- compensation
- signal input
- voltage
- 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.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention provides a reactive compensation controller based on dynamic phase-splitting compensation and a control method thereof. The structure of the controller comprises a current transformer CT, a voltage transformer PT, a real-time control module, and an intelligent capacitor. The controller is advantaged in that a multistage capacitor bank is switched in a phase-splitting manner, when voltage of a capacitor is equal to voltage of a system, the capacitor is put in the system, a transient process is eliminated completely, and compensation results are rapid, accurate, safe, and easy to control. In addition, since phase-splitting compensation is used, corresponding capacitors are respectively put in the system according to reactive power each phase needs to compensate, thereby preventing a condition that when three-phase load is not balanced, some phases are compensated excessively, and some phases are under compensated. The controller can completely compensate unbalanced reactive power. The device is low in cost, high in reliability, and low in required maintenance workload. When the controller is used for power distribution network reactive compensation, power factor of load can increased, so electric energy quality of an installation site is greatly improved. The controller has good popularization and application prospect.
Description
Technical field
The present invention is a kind of idle compensating control based on dynamic phase splitting compensation and control method thereof, belongs to electric power quality control technology field.
Background technology
In current rural power grids power distribution cabinet, generally use switching Shunt Capacitor Unit to carry out local reactive power compensation, to reach the idle conveying reduced in transmission of electricity, reduce line loss, improve quality of voltage, increase the object of meritorious conveying.
In existing low voltage parallel capacitor group connection, reactive power compensation is static compensation, and when Capacitor banks drops into, impulse current is large, and produce overvoltage during excision, self contact rapid wear, noise is melting welding greatly even, and the switching time is long.Controlling unit can not be accomplished phase-splitting, classification, fast and the requirement of tracing compensation substantially.
Summary of the invention
What the present invention proposed is a kind of idle compensating control based on dynamic phase splitting compensation and control method thereof, its object is to overcome the deficiencies in the prior art and Problems existing, this controller and control method compensation effect thereof fast, accurately, safety, cleaning and be easy to control, in addition, owing to adopting phase splitting compensation, full remuneration can be carried out to unbalanced reactive power.
Technical solution of the present invention: based on the idle compensating control of dynamic phase splitting compensation, its structure comprises Current Transmit, voltage transformer pt, real-time control module, Intelligent capacitor; Wherein the first signal input/output end of Current Transmit, the first signal input/output end corresponding first signal input/output terminal of connection bus, the secondary signal input/output terminal of bus of voltage transformer pt, the secondary signal input/output end correspondence of Current Transmit, voltage transformer pt connects first, second signal input/output terminal of real-time control module, and the signal input/output end correspondence of Intelligent capacitor connects the 3rd signal input/output terminal of real-time control module.
Based on the control method of the idle compensating control of dynamic phase splitting compensation, comprise the following steps:
(1) access voltage, current signal that the voltage transformer summation current transformer on distribution network system bus exports, be linked into friendship and adopt and count;
(2) according to the definition of reactive power, calculate three phase reactive power by single-chip microcomputer and be respectively compensatory control amount as each phase Capacitor banks;
(3) single-chip microcomputer according to compensatory control amount calculate each need mutually drop into capacitor capacity and can drop into condenser capacity as drop into or excision basis for estimation;
(4) drop into when Intelligent capacitor group receives or after excision order, determine that capacitor drops into or the excision moment by zero cross detection circuit, perform capacitor switching, drop into the Capacitor banks that capacity is applicable to, make the power factor of each phase more than 0.95;
(5) step (1) ~ (4) are repeated, can the change of follow load, realize reactive-load dynamic compensation.
Beneficial effect of the present invention is: to carry out phase-splitting switching to hierarchical capacitor group, drops into capacitor, completely eliminate transient process in condenser voltage moment equal with system voltage, makes compensation effect fast, accurately, safely, be easy to control.In addition, owing to adopting phase splitting compensation, drop into corresponding capacitor respectively, when avoiding three-phase load unbalance according to each required reactive power compensated mutually, some phase overcompensation or some mutually under-compensated situation, can carry out full remuneration to unbalanced reactive power.And dynamic reactive power phase splitting compensation installation cost of the present invention is low, reliability is high, relatively need maintenance workload little.During for distribution network var compensation, the power factor of load can be improved, the quality of power supply of infield be improved greatly, there is good popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is the idle compensating control of the dynamic phase splitting compensation of the present invention and the annexation schematic diagram of network system bus.
Fig. 2 is the control flow chart of the idle compensating control of the dynamic phase splitting compensation of the present invention.
Embodiment
Based on the idle compensating control of dynamic phase splitting compensation, its structure comprises Current Transmit, voltage transformer pt, real-time control module, Intelligent capacitor; Wherein the first signal input/output end of Current Transmit, the first signal input/output end corresponding first signal input/output terminal of connection bus, the secondary signal input/output terminal of bus of voltage transformer pt, the secondary signal input/output end correspondence of Current Transmit, voltage transformer pt connects first, second signal input/output terminal of real-time control module, and the signal input/output end correspondence of Intelligent capacitor connects the 3rd signal input/output terminal of real-time control module.
Described Intelligent capacitor group is made up of capacitor, zero cross detection circuit, owing to there being zero cross detection circuit, can not impact when capacitor drops into or excises to distribution network systems.In addition, every four groups mutually of capacitor, capacity distributes by 1: 2: 4: 8, phase-splitting, classification switching.
Described real-time control module comprises control relay, chip, power supply unit are adopted in single-chip microcomputer, friendship; The signal input/output end that wherein chip is adopted in control relay, single-chip microcomputer, friendship is connected in series successively.
Described single-chip microcomputer as host CPU, as the main control part of real-time control module, realizes the mutual of data processing and peripheral components by ATMEL ARM SAM4L.
Described special friendship is adopted chip and is used ATT7022E chip, realizes collection and exchanges the essential informations such as the voltage and current of inlet wire.
Described power subsystem realizes whole system function of supplying power.
The output signal being connected on the voltage transformer summation current transformer on network system bus is input to real-time control module.
Below in conjunction with accompanying drawing, the invention will be further described:
Describe example in detail as shown in Figure 1, low-voltage bus bar 1 is connected through voltage transformer (PT) 2 summation current transformer (CT) 3 with electric current with voltage by wire, voltage transformer (PT) 2 summation current transformer (CT) 3 is connected with real-time control module by wire, the output of described voltage transformer (PT) 2 summation current transformer (CT) 3 is connected with handing over the input adopting chip respectively, described friendship is adopted chip and is connected by spi bus with single-chip microcomputer, and the control pin of described single-chip microcomputer is connected with control relay.Described control relay output is with on impulse form access capacitor group switching switch.
Specific works mode is: adopt three-phase current and three-phase and four-line voltage as reactive power compensation signal source, three-phase current and three-phase four-wire system voltage are accessed friendship simultaneously and adopts chip, adopt chip by friendship and gather analog signal, calculation process is carried out by single-chip microcomputer, draw corresponding compensation way and compensation capacity, send control level by single-chip microcomputer output pin, control relay utilizes impulse form to send signal.After Intelligent capacitor receives pulse control signal, drop into, excise during current over-zero when zero cross detection circuit detects voltage zero-cross, control capacitor completes and drops into or excision in a cycle, and during input, no-flashy-flow produces, without overvoltage during excision.Ensure the safety of electrical network and custom power equipment.
The control method of the idle compensating control of dynamic phase splitting compensation, comprises the following steps:
(1) access voltage, current signal that the voltage transformer summation current transformer on distribution network system bus exports, be linked into friendship and adopt and count;
(2) according to the definition of reactive power, calculate three phase reactive power by single-chip microcomputer and be respectively compensatory control amount as each phase Capacitor banks;
(3) single-chip microcomputer according to compensatory control amount calculate each need mutually drop into capacitor capacity and can drop into condenser capacity as drop into or excision basis for estimation;
(4) after Intelligent capacitor group receives input or excision order; determine that capacitor drops into or the excision moment by zero cross detection circuit; perform capacitor switching; the Capacitor banks that input capacity is applicable to; make the power factor of each phase more than 0.95; when capacitor drops into excision, follow following Preservation tactics:
1) overvoltage protection: controller is provided with 2 grades of overvoltage protections, when voltage is greater than first order overvoltage action thresholding but is less than second level overvoltage action thresholding, controller does not send the instruction dropping into capacitor, only performs the instruction of excision capacitor; When voltage is greater than second level overvoltage action thresholding, controller excised all capacitors by platform in 1 minute,
2) under-voltage protection: controller has under-voltage protection function, when voltage is less than under voltage action thresholding, excises all capacitors immediately,
3) open-phase protection: controller has default-phase protection function, when there is open-phase protection, excises all capacitors immediately,
4) harmonic protection is crossed: controller has overvoltage and overcurrent harmonic protection function, and when voltage harmonic or current harmonics are greater than set action thresholding, controller excises all capacitors immediately,
5) step (1) ~ (4) are repeated, can the change of follow load, realize reactive-load dynamic compensation.
Claims (4)
1., based on the idle compensating control of dynamic phase splitting compensation, it is characterized in that comprising Current Transmit, voltage transformer pt, real-time control module, Intelligent capacitor; Wherein the first signal input/output end of Current Transmit, the first signal input/output end corresponding first signal input/output terminal of connection bus, the secondary signal input/output terminal of bus of voltage transformer pt, the secondary signal input/output end correspondence of Current Transmit, voltage transformer pt connects first, second signal input/output terminal of real-time control module, and the signal input/output end correspondence of Intelligent capacitor connects the 3rd signal input/output terminal of real-time control module.
2. the idle compensating control based on dynamic phase splitting compensation according to claim 1, it is characterized in that described Intelligent capacitor group is made up of capacitor, zero cross detection circuit, wherein every four groups mutually of capacitor, capacity distributes by 1: 2: 4: 8, phase-splitting, classification switching.
3. the idle compensating control based on dynamic phase splitting compensation according to claim 1, is characterized in that described real-time control module comprises control relay, chip, power supply unit are adopted in single-chip microcomputer, friendship; The signal input/output end that wherein chip is adopted in control relay, single-chip microcomputer, friendship is connected in series successively.
4., as claimed in claim 1 based on the control method of the idle compensating control of dynamic phase splitting compensation, it is characterized in that comprising the following steps:
(1) access voltage, current signal that the voltage transformer summation current transformer on distribution network system bus exports, be linked into friendship and adopt and count;
(2) according to the definition of reactive power, calculate three phase reactive power by single-chip microcomputer and be respectively compensatory control amount as each phase Capacitor banks;
(3) single-chip microcomputer according to compensatory control amount calculate each need mutually drop into capacitor capacity and can drop into condenser capacity as drop into or excision basis for estimation;
(4) drop into when Intelligent capacitor group receives or after excision order, determine that capacitor drops into or the excision moment by zero cross detection circuit, perform capacitor switching, drop into the Capacitor banks that capacity is applicable to, make the power factor of each phase more than 0.95;
(5) step (1) ~ (4) are repeated, can the change of follow load, realize reactive-load dynamic compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510337307.5A CN104882894A (en) | 2015-06-18 | 2015-06-18 | Reactive compensation controller based on dynamic phase-splitting compensation and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510337307.5A CN104882894A (en) | 2015-06-18 | 2015-06-18 | Reactive compensation controller based on dynamic phase-splitting compensation and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104882894A true CN104882894A (en) | 2015-09-02 |
Family
ID=53950278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510337307.5A Pending CN104882894A (en) | 2015-06-18 | 2015-06-18 | Reactive compensation controller based on dynamic phase-splitting compensation and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104882894A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375491A (en) * | 2015-11-20 | 2016-03-02 | 中国西电电气股份有限公司 | Three-phase reactive power unbalance compensation method |
| CN106849125A (en) * | 2017-03-21 | 2017-06-13 | 佛山市施诺尔电气有限公司 | A kind of intelligent capacitor compensation device and capacitor switching method |
| CN110912151A (en) * | 2019-12-19 | 2020-03-24 | 西安西电电力电容器有限责任公司 | On-pole reactive compensation control method and device for alternating current transmission line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066345A (en) * | 1991-04-27 | 1992-11-18 | 天津市工人业余技术大学 | The reactive power compensation that single-chip microcomputer is controlled automatically and the integration unit of relaying protection |
| CN103078332A (en) * | 2013-01-05 | 2013-05-01 | 山西省电力公司大同供电分公司 | Transformer inductive reactive power stepped control device and method |
| CN204741280U (en) * | 2015-06-18 | 2015-11-04 | 南京新联能源技术有限责任公司 | Reactive compensation controller based on developments phase separating compensation |
-
2015
- 2015-06-18 CN CN201510337307.5A patent/CN104882894A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066345A (en) * | 1991-04-27 | 1992-11-18 | 天津市工人业余技术大学 | The reactive power compensation that single-chip microcomputer is controlled automatically and the integration unit of relaying protection |
| CN103078332A (en) * | 2013-01-05 | 2013-05-01 | 山西省电力公司大同供电分公司 | Transformer inductive reactive power stepped control device and method |
| CN204741280U (en) * | 2015-06-18 | 2015-11-04 | 南京新联能源技术有限责任公司 | Reactive compensation controller based on developments phase separating compensation |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375491A (en) * | 2015-11-20 | 2016-03-02 | 中国西电电气股份有限公司 | Three-phase reactive power unbalance compensation method |
| CN105375491B (en) * | 2015-11-20 | 2018-06-26 | 中国西电电气股份有限公司 | A kind of three phase reactive power imbalance compensation method |
| CN106849125A (en) * | 2017-03-21 | 2017-06-13 | 佛山市施诺尔电气有限公司 | A kind of intelligent capacitor compensation device and capacitor switching method |
| CN106849125B (en) * | 2017-03-21 | 2024-05-14 | 广东汇之华电气有限公司 | Intelligent capacitance compensation device and capacitance switching method |
| CN110912151A (en) * | 2019-12-19 | 2020-03-24 | 西安西电电力电容器有限责任公司 | On-pole reactive compensation control method and device for alternating current transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102055202B (en) | Three-phase balancing power-supply energy-saving control management system | |
| CN106887856A (en) | Three-phase imbalance adjustment control method, device and three-phase imbalance regulating system | |
| CN205104911U (en) | Novel lossless balanced load of distributing type three -phase device | |
| CN203352191U (en) | Multi-adaptive photovoltaic inverter detection system | |
| CN110460052A (en) | A kind of photovoltaic inversion control method that can improve distribution network electric energy quality | |
| CN103675563A (en) | Energy-saving multifunctional power test system | |
| CN106816883A (en) | Three-phase imbalance regulating system parallel connection input coefficient, control method and device | |
| CN104882894A (en) | Reactive compensation controller based on dynamic phase-splitting compensation and control method thereof | |
| CN204886200U (en) | Distribution transformer unbalanced three phase current detection compensation arrangement | |
| CN102946108A (en) | Voltage automatic compensation device | |
| CN204741280U (en) | Reactive compensation controller based on developments phase separating compensation | |
| CN103326373B (en) | Dynamic reactive power compensation device suitable for multiple-direct-current feed-in grid and control method of dynamic reactive power compensation device | |
| CN203339701U (en) | Multi-target loss reduction device | |
| CN205335840U (en) | Join in marriage network current compensation arrangement | |
| CN208623392U (en) | A kind of complex electric energy comprehensive quality control device | |
| CN203491701U (en) | Harmonic-resistant intelligent integrated power capacitor | |
| CN205104912U (en) | Novel lossless balanced load of centralized three -phase device | |
| CN206401903U (en) | A kind of three-phrase burden balance reactive power compensator | |
| CN201928091U (en) | Intelligent power distribution electric energy management centralized control cabinet | |
| CN211720266U (en) | Three-phase unbalanced power supply regulation transmission cabinet device | |
| CN204407907U (en) | A kind of pressure-adjusting type voltage reactive automatic compensation device | |
| CN203747426U (en) | Low-voltage dynamic filtering reactive compensation device | |
| CN203630258U (en) | An energy-saving type multifunctional electric power test system | |
| CN210669141U (en) | Skid-mounted distribution equipment | |
| CN202218020U (en) | Phase-control-type reactive power dynamic compensating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |