CN105552928A - Series-connection/parallel-connection hybrid capacitor compensation apparatus for 10kV power distribution line - Google Patents
Series-connection/parallel-connection hybrid capacitor compensation apparatus for 10kV power distribution line Download PDFInfo
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- CN105552928A CN105552928A CN201610062403.8A CN201610062403A CN105552928A CN 105552928 A CN105552928 A CN 105552928A CN 201610062403 A CN201610062403 A CN 201610062403A CN 105552928 A CN105552928 A CN 105552928A
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- 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
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
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- 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
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a series-connection/parallel-connection hybrid capacitor compensation apparatus for a 10kV power distribution line. The series-connection/parallel-connection hybrid capacitor compensation apparatus is characterized by comprising a series-connection capacitor compensation unit and a parallel-connection capacitor compensation unit, wherein the series-connection capacitor compensation unit is connected to the power distribution line in series; and the parallel-connection capacitor compensation unit is arranged at the front end of the series-connection capacitor compensation unit and positioned on the power supply side of the power distribution line. The hybrid capacitor compensation apparatus is applied to low voltage management of partial special 10 kV power distribution network circuits, and can improve voltage distribution along the circuits, regulate the voltage to a qualified level and improve the circuit conveying capacity; and in addition, the hybrid capacitor compensation apparatus has the characteristics of load adaptive voltage regulation and real-time response, can lower series compensation degrees of series compensation, and can improve the stability and reliability of the apparatus and target circuits.
Description
Technical field
The present invention relates to a kind of 10kV distribution line serial, parallel connection mixed type Electric capacity compensation device.
Background technology
Distribution quality of voltage weighs the whether standard compliant important indicator of power supply quality, and the quality of its quality is directly connected to the safety and economic operation of power consumption equipment and the normal operation of production.It is little to there is wire diameter in China's power distribution network part circuit, circuit long (especially mountain village circuit), the present situation that distribution transformer quantity is many, even compared with multi-line with the jumbo motor of multiple stage or change industrial load rapidly, often cause line end low-voltage, Voltage Drop serious.
Series capacitor compensation technology can significantly improve transmission line utilization ratio in power transmission network, promotes to realize electric power long distance, Large Copacity, high-efficiency transfer; Be applied to the lower radial distribution line of voltage can improve voltage's distribiuting situation, reduce voltage flicker.Its structure is relative with control simple, is very suitable for improving long distance distribution line terminal voltage situation on the low side.But the application of Series Compensation in some special distribution line can be under some influence, these circuits cause voltage drop mainly because wire diameter is little because line resistance causes, and therefore series capacitor compensation needs the higher string benefit degree of configuration just can reach relatively significantly voltage boosting effect.Higher string benefit degree can cause certain risk, comprises and impacting line transformer, instrument transformer or electric motor starting, increases the probability that ferro resonance produces, and then affects the security and stability of circuit and power consumption equipment.
When only adopting shunt capacitor to compensate in this kind of low-voltage lines, often need many groups and mend device, producing as large in maintenance, switch motion is frequent, noise is large, the problems such as response speed is slow, and often causes the problem of " during heavy duty, during voltage low, underloading, voltage is high ".For special circuit, only rely on shunt capacitor to compensate and also cannot meet voltage request.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide the technical scheme of a kind of 10kV distribution line serial, parallel connection mixed type Electric capacity compensation device.
Described 10kV distribution line serial, parallel connection mixed type Electric capacity compensation device, it is characterized in that comprising series capacitor compensation unit and shunt capacitor compensating unit, series capacitor compensation units in series access distribution line, shunt capacitor compensating unit is arranged on series capacitor compensation unit front end and is positioned at distribution line mains side.
Described 10kV distribution line serial, parallel connection mixed type Electric capacity compensation device, is characterized in that described series capacitor compensation unit comprises switching console switch, transducer, series capacitor bank, proterctive equipment, photo-translating system and controller;
Switching console switch, safeguards the isolation of timer and circuit, comprises switching circuit breaker, the first isolating switch and the second isolating switch for automatically or manually the dropping into of device/excision and device internal overhaul;
Transducer, comprises voltage transformer, current transformer and voltage transformer and to hold concurrently capacitor discharging circuit, for slotted line route voltage, capacitor bank voltage, Capacitor banks electric current, provides the discharge circuit of controller power source and capacitor;
Series capacitor bank, its series connection access distribution line, compensated line induction reactance and reactive power, promote circuit full line voltage level;
Proterctive equipment, is comprised thyristor valve, integrated damping reactance/resistor and bypass contactor, for the bypass protection of series capacitor bank, is controlled by controller to thyristor valve and bypass contactor, make protection act reliable rapidly;
Photo-translating system, comprises Transmission Fibers and optical-electrical converter, for controller to the trigging control of thyristor valve and state acquisition;
Controller, comprise programmable logic chip, level translator, Phototube Coupling, numeral and analog input and output unit, AD sampling A/D chip, controller is used for automatic switching, produces alarm and guard signal, monitoring and protecting equipment and Capacitor banks state, Background communication;
Described shunt capacitor compensating unit, comprise Shunt Capacitor Unit and fling-cut switch, fling-cut switch is controlled by the controller, and Shunt Capacitor Unit is for reducing the design string benefit degree of series capacitor bank.
Described 10kV distribution line serial, parallel connection mixed type Electric capacity compensation device, is characterized in that:
Described switching circuit breaker serial connection is arranged on distribution line, and switching circuit breaker two ends connect the first isolating switch and the second isolating switch respectively, are arranged in series series capacitor bank between the first isolating switch and the second isolating switch, form series compensation loop; Series compensation loop is often in series and a current transformer, any two is set alternate a voltage transformer is set, voltage transformer is for measuring the line voltage of distribution line, for ups power provides energy, current transformer flows through the electric current of series capacitor bank for measuring; The Capacitor banks two ends that are often in series are arranged in parallel a voltage transformer and hold concurrently capacitor discharging circuit, and the voltage for measuring series capacitor bank two ends is held concurrently the discharge circuit of series capacitor bank simultaneously;
Described thyristor valve is connected in parallel on series capacitor bank two ends with after integrated damping reactance/resistor in series, series capacitor bank two ends are also arranged in parallel one or three pole bypass contactors, thyristor valve is used for the quick overvoltage protection of series capacitor bank branch road with integrated damping reactance/resistor, and bypass contactor is used for the second class protection of thyristor valve branch road;
Described photo-translating system is the mutual passage of thyristor valve and controller information, and comprise Transmission Fibers and optical-electrical converter, carried out the transmission of signal by photo-translating system, signal comprises triggering signal and the status monitoring signal of thyristor valve;
Described shunt capacitor compensating unit, comprises Shunt Capacitor Unit and fling-cut switch, and Shunt Capacitor Unit is attempted by series capacitor compensation unit front end by fling-cut switch and is positioned at distribution line mains side.
The present invention comprises series capacitor compensation unit and shunt capacitor compensating unit, the low-voltage being applied to the special 10kV distribution network line of part is administered, circuit voltage's distribiuting along the line, regulation voltage can be improved to qualified level, raising circuit transmission capacity, there is the feature of load " self adaptation " voltage-regulation and real-time response, and mend the string benefit degree that can reduce string and mend, increase stability and the reliability of device and target line.
The present invention comprises series capacitor compensation unit and shunt capacitor compensating unit, while the use of shunt capacitor can ensure distribution line voltage boosting effect, reduces string the benefits degree of series capacitor, the stability of raising device and circuit and reliability.The 10kV distribution network line that there is low-voltage problem comparatively thin for wire diameter, load is heavier, only by series capacitor compensation technology, want booster tension to qualified level, may need to configure the series capacitor compared with high series compensatnig degree, thus increase the risk of device and circuit.Configuring suitable shunt capacitor near mains side (front end of series capacitor), the string benefit degree of series capacitor can be reduced.Shunt capacitor and series capacitor coordinated operation, can ensure the effect that voltage promotes, and also can improve stability and the reliability of device and circuit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of primary system of the present invention;
Fig. 2 is electrical block diagram of the present invention;
Fig. 3 is overall system control block diagram of the present invention;
In figure: 1-switching console switch, 2-transducer, 3-fling-cut switch, 4-proterctive equipment, 5-photo-translating system, 6-controller, 1.1-switching circuit breaker, 1.2-first isolating switch, 1.3-second isolating switch, 2.1-voltage transformer, 2.2-current transformer, 2.3-voltage transformer is held concurrently capacitor discharging circuit, 3.1-series capacitor bank, 3.2-Shunt Capacitor Unit, 4.1-thyristor valve, 4.2-integration damping reactance/resistor, 4.3-bypass contactor, 5.1-optical-electrical converter, 6.1-programmable logic chip, 6.2-level translator, 6.3-Phototube Coupling, 6.4-AD sampling A/D chip.
Embodiment
Below in conjunction with Figure of description, the invention will be further described:
10kV distribution line serial, parallel connection mixed type Electric capacity compensation device, comprise series capacitor compensation unit C1 and shunt capacitor compensating unit C2, series capacitor compensation units in series access distribution line, shunt capacitor compensating unit is arranged on series capacitor compensation unit front end and is positioned at distribution line mains side.Series capacitor compensation unit and shunt capacitor compensating unit are the main parts that device realizes compensate function, and its capacity and capacitor number, according to concrete line parameter circuit value and operating mode, are configured by Load flow calculation.When device normally works, when not adding any control, the voltage of series capacitor compensation can the change of real-time response load current automatically.When device breaks down, the controller of device is by can alarm, in short-term bypass and the protection of implement device to the operation of thyristor valve, bypass contactor and switching circuit breaker.
The series compensation of distribution mainly plays the effect improving radial distribution line voltage's distribiuting along the line and reduce Voltage Drop, effectively improves the line end voltage of application of installation to acceptability limit.During device work, series capacitor bank series connection access distribution line is compensated, when device exits, (comprise automatically exiting of protection) by series capacitor bank bypass.In the application scenario of the little special circuit of wire diameter, ensure certain voltage boosting effect, the series capacitor of the string benefit degree needing configuration higher, therefore in the Shunt Capacitor Unit by 10kV mains side configuration suitable capacity, effectively can reduce the design string benefit degree of series capacitor, thus improve stability and the reliability of circuit and power consumption equipment.
Series capacitor compensation unit of the present invention comprises switching console switch 1, transducer 2, series capacitor bank 3, proterctive equipment 5, photo-translating system 6 and controller 7;
Switching console switch 1, safeguards the isolation of timer and circuit, comprises switching circuit breaker 1.1, first isolating switch 1.2 and the second isolating switch 1.3 for automatically or manually the dropping into of device/excision and device internal overhaul;
Transducer 2 is measuring components of device, comprise voltage transformer 2.1, current transformer 2.2 and voltage transformer to hold concurrently capacitor discharging circuit 2.3, for slotted line route voltage, capacitor bank voltage, Capacitor banks electric current, provide the discharge circuit of controller power source and capacitor;
Series capacitor bank 3.1, its series connection access distribution line, compensated line induction reactance and reactive power, promote circuit full line voltage level;
Proterctive equipment 4, is comprised thyristor valve 4.1, integrated damping reactance/resistor 4.2 and bypass contactor 4.3, for the bypass protection of series capacitor bank, is controlled by controller to thyristor valve and bypass contactor, make protection act reliable rapidly;
Photo-translating system 5, comprises Transmission Fibers and optical-electrical converter 5.1, for trigging control and the state acquisition of controller 6 pairs of thyristor valves;
Controller 6; comprise programmable logic chip 6.1, level translator 6.2, Phototube Coupling 6.3, numeral and analog input and output unit, AD sampling A/D chip 6.4, controller is used for automatic switching, produces alarm and guard signal, monitoring and protecting equipment and Capacitor banks state, Background communication.
Shunt capacitor compensating unit of the present invention, comprise Shunt Capacitor Unit 3.2 and fling-cut switch 8, fling-cut switch is controlled by the controller, and Shunt Capacitor Unit is for reducing the design string benefit degree of series capacitor bank.
Particularly, switching circuit breaker 1.1 serial connection is arranged on distribution line, switching circuit breaker 1.1 two ends connect the first isolating switch 1.2 respectively and are arranged in series series capacitor bank 3.1 between the second isolating switch 1.3, first isolating switch 1.2 and the second isolating switch 1.3, form series compensation loop; Series compensation loop is often in series and a current transformer 2.1, any two is set alternate a voltage transformer 2.2 is set, voltage transformer 2.2 is for measuring the line voltage of distribution line, for ups power provides energy, current transformer 2.1 flows through the electric current of series capacitor bank for measuring; Capacitor banks 3.1 two ends that are often in series are arranged in parallel a voltage transformer and hold concurrently capacitor discharging circuit 2.3, and the voltage for measuring series capacitor bank two ends is held concurrently the discharge circuit of series capacitor bank simultaneously.
Thyristor valve 4.1 is connected in parallel on series capacitor bank 3.1 two ends after connecting with integrated damping reactance/resistor 4.2; series capacitor bank two ends are also arranged in parallel one or three pole bypass contactors 4.3; thyristor valve is used for the quick overvoltage protection of series capacitor bank branch road with integrated damping reactance/resistor, and bypass contactor is used for the second class protection of thyristor valve branch road.
Photo-translating system 5 is passages of thyristor valve 4.1 and controller 6 information interaction, and comprise Transmission Fibers and optical-electrical converter 5.1, carried out the transmission of signal by photo-translating system, signal comprises triggering signal and the status monitoring signal of thyristor valve.
Shunt capacitor compensating unit, comprises Shunt Capacitor Unit 3.2 and fling-cut switch 3, and Shunt Capacitor Unit 3.2 is attempted by series capacitor compensation unit front end by fling-cut switch 3 and is positioned at distribution line mains side.
The main body of the every phase of three-phase high-voltage thyristor valve of proterctive equipment 4 is a pair antiparallel controllable silicon; every phase controllable silicon externally has two rows of electrical connection; three-phase integratedization damping reactance after resistor 4.2 connects with three-phase controllable silicon valve respectively, be connected in the two ends of series capacitor bank 3.1 in parallel.Bypass contactor 4.3 belongs to the mechanical switch realizing protection, is connected in the two ends of series capacitor bank 3.1 equally in parallel.
Thyristor valve 4.1 carries out information interaction by photo-translating system 5 and controller 6.Controller 6 sends silicon controlled trigger signal by triggering optical fiber, returns collecting fiber controllable silicon both end voltage state to judge controlled silicon conducting state by state.Light signal is converted to the signal of telecommunication to reach the effect of Phototube Coupling by optical-electrical converter 5.2, prevents electromagnetic interference, the reliability improving thyristor valve work and insulating properties.Controller 6 accepts analog quantity and digital quantity signal by transducer 2 and photo-translating system 5, calculates system, closes electronic power switch control mechanical switch.
When low-voltage administered by needs, the Shunt Capacitor Unit 3.2 be positioned near 10kV line electricity source is controlled its input by control system, as Fig. 1 signal.In switching console switch 1, the first isolating switch 1.2, second isolating switch 1.3 is installed on the two ends of switching circuit breaker 1.1 and is placed in closing position, and when switching circuit breaker 1.1 separating brake, series capacitor bank drops into circuit.
When device generation fault needs to protect, close a floodgate after control system triggering controlled silicon conducting bypass contactor and switching circuit breaker.
The low-voltage that the present invention is applied to the special 10kV distribution network line of part is administered, circuit voltage's distribiuting along the line, regulation voltage can be improved to qualified level, raising circuit transmission capacity, there is the feature of load " self adaptation " voltage-regulation and real-time response, and mend the string benefit degree that can reduce string and mend, increase stability and the reliability of device and target line.
Claims (3)
1.10kV distribution line serial, parallel connection mixed type Electric capacity compensation device, it is characterized in that comprising series capacitor compensation unit and shunt capacitor compensating unit, series capacitor compensation units in series access distribution line, shunt capacitor compensating unit is arranged on series capacitor compensation unit front end and is positioned at distribution line mains side.
2. 10kV distribution line serial according to claim 1, parallel connection mixed type Electric capacity compensation device, is characterized in that described series capacitor compensation unit comprises switching console switch, transducer, series capacitor bank, proterctive equipment, photo-translating system and controller;
Switching console switch, safeguards the isolation of timer and circuit, comprises switching circuit breaker, the first isolating switch and the second isolating switch for automatically or manually the dropping into of device/excision and device internal overhaul;
Transducer, comprises voltage transformer, current transformer and voltage transformer and to hold concurrently capacitor discharging circuit, for slotted line route voltage, capacitor bank voltage, Capacitor banks electric current, provides the discharge circuit of controller power source and capacitor;
Series capacitor bank, its series connection access distribution line, compensated line induction reactance and reactive power, promote circuit full line voltage level;
Proterctive equipment, is comprised thyristor valve, integrated damping reactance/resistor and bypass contactor, for the bypass protection of series capacitor bank, is controlled by controller to thyristor valve and bypass contactor, make protection act reliable rapidly;
Photo-translating system, comprises Transmission Fibers and optical-electrical converter, for controller to the trigging control of thyristor valve and state acquisition;
Controller, comprise programmable logic chip, level translator, Phototube Coupling, numeral and analog input and output unit, AD sampling A/D chip, controller is used for automatic switching, produces alarm and guard signal, monitoring and protecting equipment and Capacitor banks state, Background communication;
Described shunt capacitor compensating unit, comprise Shunt Capacitor Unit and fling-cut switch, fling-cut switch is controlled by the controller, and Shunt Capacitor Unit is for reducing the design string benefit degree of series capacitor bank.
3. 10kV distribution line serial according to claim 2, parallel connection mixed type Electric capacity compensation device, is characterized in that:
Described switching circuit breaker serial connection is arranged on distribution line, and switching circuit breaker two ends connect the first isolating switch and the second isolating switch respectively, are arranged in series series capacitor bank between the first isolating switch and the second isolating switch, form series compensation loop; Series compensation loop is often in series and a current transformer, any two is set alternate a voltage transformer is set, voltage transformer is for measuring the line voltage of distribution line, for ups power provides energy, current transformer flows through the electric current of series capacitor bank for measuring; The Capacitor banks two ends that are often in series are arranged in parallel a voltage transformer and hold concurrently capacitor discharging circuit, and the voltage for measuring series capacitor bank two ends is held concurrently the discharge circuit of series capacitor bank simultaneously;
Described thyristor valve is connected in parallel on series capacitor bank two ends with after integrated damping reactance/resistor in series, series capacitor bank two ends are also arranged in parallel one or three pole bypass contactors, thyristor valve is used for the quick overvoltage protection of series capacitor bank branch road with integrated damping reactance/resistor, and bypass contactor is used for the second class protection of thyristor valve branch road;
Described photo-translating system is the mutual passage of thyristor valve and controller information, and comprise Transmission Fibers and optical-electrical converter, carried out the transmission of signal by photo-translating system, signal comprises triggering signal and the status monitoring signal of thyristor valve;
Described shunt capacitor compensating unit, comprises Shunt Capacitor Unit and fling-cut switch, and Shunt Capacitor Unit is attempted by series capacitor compensation unit front end by fling-cut switch and is positioned at distribution line mains side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610062403.8A CN105552928A (en) | 2016-01-29 | 2016-01-29 | Series-connection/parallel-connection hybrid capacitor compensation apparatus for 10kV power distribution line |
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| CN201610062403.8A CN105552928A (en) | 2016-01-29 | 2016-01-29 | Series-connection/parallel-connection hybrid capacitor compensation apparatus for 10kV power distribution line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229994A (en) * | 2016-07-28 | 2016-12-14 | 中电普瑞科技有限公司 | A kind of novel series compensation device |
| CN106329539A (en) * | 2016-09-07 | 2017-01-11 | 云南电网有限责任公司电力科学研究院 | Method and device for improving voltage sag of distribution network |
| CN106849101A (en) * | 2017-01-22 | 2017-06-13 | 石家庄铁道大学 | A kind of step voltage regulator |
| CN106899024A (en) * | 2017-03-10 | 2017-06-27 | 国家电网公司 | A kind of low-voltage controlling device for being applied to low voltage power distribution network |
| CN110460066A (en) * | 2019-08-30 | 2019-11-15 | 常州博瑞电力自动化设备有限公司 | A kind of box distribution series compensation device |
| CN111224367A (en) * | 2020-04-07 | 2020-06-02 | 梁家诚 | 10kV distribution line ice-melting system that does not have a power failure with voltage and reactive power optimization |
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| CN103701135A (en) * | 2013-11-25 | 2014-04-02 | 国家电网公司 | Intelligent series compensation device for distribution network and use method of compensation device |
| CN105226657A (en) * | 2015-10-26 | 2016-01-06 | 国网上海市电力公司 | A kind of series-parallel comprehensive compensation arrangement administered for power distribution network low-voltage |
| CN205544299U (en) * | 2016-01-29 | 2016-08-31 | 浙江桂容谐平科技有限责任公司 | 10kV distribution lines cluster, compounding in parallel type capacitance compensation device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106229994A (en) * | 2016-07-28 | 2016-12-14 | 中电普瑞科技有限公司 | A kind of novel series compensation device |
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| CN106849101B (en) * | 2017-01-22 | 2023-08-18 | 石家庄铁道大学 | Hierarchical voltage regulator |
| CN106899024A (en) * | 2017-03-10 | 2017-06-27 | 国家电网公司 | A kind of low-voltage controlling device for being applied to low voltage power distribution network |
| CN110460066A (en) * | 2019-08-30 | 2019-11-15 | 常州博瑞电力自动化设备有限公司 | A kind of box distribution series compensation device |
| CN111224367A (en) * | 2020-04-07 | 2020-06-02 | 梁家诚 | 10kV distribution line ice-melting system that does not have a power failure with voltage and reactive power optimization |
| CN111224367B (en) * | 2020-04-07 | 2021-07-16 | 梁家诚 | 10kV distribution line ice-melting system that does not have a power failure with voltage and reactive power optimization |
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