CN106026119A - Reactive compensation method for long-distance multi-load-node linear power supply system - Google Patents
Reactive compensation method for long-distance multi-load-node linear power supply system Download PDFInfo
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- CN106026119A CN106026119A CN201610366684.6A CN201610366684A CN106026119A CN 106026119 A CN106026119 A CN 106026119A CN 201610366684 A CN201610366684 A CN 201610366684A CN 106026119 A CN106026119 A CN 106026119A
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- switch station
- station
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- center switch
- compensation
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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
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
-
- 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
- H02J3/20—Arrangements for adjusting, eliminating or compensating reactive power in networks in long overhead lines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a reactive compensation method for a long-distance multi-load-node linear power supply system. The reactive compensation method comprises the steps that 1, the arrangement positions of central switching stations and contact switching stations are reasonably determined when the long-distance multi-load-node linear power supply system is designed; the contact switching stations are positioned between corresponding two adjacent central switching stations; 2, the lengths of the overhead circuits and the cable circuits between each central switching station and the adjacent contact switching station are calculated; the electrical central position of the line-to-ground capacitive current is calculated; a circuit breaker station is arranged at the electrical central position; and 3, the reactive power compensation is performed based on the principle of a combination of concentrated compensation and dispersion compensation. The reactive compensation method has the advantages that the phenomenon of relatively low power factor can be greatly reduced, and remarkable economic benefit can be achieved.
Description
Technical field
The present invention relates to electric power system reactive-load compensation method, especially relate to distance, the reactive-load compensation method of many load buses wire electric power system.
Background technology
Distance, many load buses wire electric power system, is widely used in the engineerings such as distance large water transportation water delivery engineering, highway, high ferro, urban subway tunnel.It is characterized in that (along supply line) load bus along the line is many.Now as a example by distance large water transportation water delivery trunk canal, bleeder gate, control gate, water-break gate, emergency repair gate and other building along the line are a lot, load bus makes the number of cables used increase the most therewith more, and electric power system is, and wire additionally arranges, thus result in electric power system power factor too low, causing the waste of electric energy, the power that grid company is imposed adjusts expense to be consequently increased, and adds the operating cost of electric power system.Center switch station power factor in advance and far below standard value, causes disjunction equipment folding difficulty, and when there is singlephase earth fault, earthing capacitance current also will greatly increase, and electric arc is difficult to extinguishing, causes failure propagation, there is harmonic pollution simultaneously and powers environmental problem.
Summary of the invention
Present invention aim at providing a kind of distance, the reactive-load compensation method of many load buses wire electric power system.
For achieving the above object, the present invention takes following technical proposals:
Distance of the present invention, the reactive-load compensation method of many load buses wire electric power system, carried out as steps described below:
The first step, design described distance, many load buses wire electric power system time, according to the power load distributing of many load buses, rationally determine center switch station, the position at interconnection switch station；Drawing of center switch station position consideration power supply point connects, supply load scope, supply load size, power supply distance factor；Described interconnection switch station is disposed in adjacent two centre positions, center switch station；Distance, many load buses wire electric power system is arranged as required to multiple center switch station and interconnection switch station, time properly functioning, the interconnection switch at interconnection switch station is off, and each center switch station radius of electricity supply is the half of the spacing at two adjacent center switch stations；
Second step, the overhead transmission line length calculated between each center switch station and adjacent interconnection switch station, cable run length, and calculate the electrical centre position of described line-to-ground capacity current, arranging fuser station in described electrical centre position, the reactive-load compensation that described fuser station is electric power system provides equipment position；
3rd step, the principle combined with dispersion compensation according to centralized compensation；
Described centralized compensation is: calculate the reactive power capacity of each center switch station extremely adjacent interconnection switch station line-to-ground capacity current, bus bar side at each center switch station is implemented lagging reactive power by dynamic reactive compensation device and is compensated, and lagging reactive power capacity is that 30% and this center switch station of this center switch station to bilateral adjacent interconnection switch station transmission line of electricity capacity current capacity are to power system transformer substation transmission line of electricity capacity current capacity sum；
Described center switch station, interconnection switch station, fuser station belong to load bus, including other load buses, all there is electrical equipment in each load bus, when the method for operation of equipment changes, also the power factor of center switch station bus is had influence in certain limit, therefore the bus bar side at center switch station arranges dynamic reactive compensation device, it is achieved centralized compensation.
Described dispersion compensation is: calculate the reactive power capacity of each center switch station extremely adjacent interconnection switch station transmission line of electricity capacity current over the ground, implementing lagging reactive power in respective fuser station bus bar side by constant reactance device to compensate, lagging reactive power capacity is that this center switch station is to the 70% of adjacent interconnection switch station transmission line of electricity capacity current.
The invention has the advantages that realization greatly improves the phenomenon that power factor is on the low side, remarkable in economical benefits；Use the reactive-load compensation of Concentrate bid, the reasonable distribution centralized compensation capacity ratio that compensate demand capacity shared with dispersion compensation capacity, the lagging reactive power of constant reactance device output offsets the capacitive charging reactive power that line cord produces, the problem reducing the overtension that capacitive reactive power causes, good action is played safely in the operation to electric power supply system equipment；Each center switch station is implemented dynamic passive compensation and is realized perception, the bidirectional compensating of capacitive reactive power, dynamic tracking real-Time Compensation, reach to be automatically adjusted compensation, the function of filtering, harmonic pollution is prevented to power environment, meet the electric power system demand to harmonic wave control, decrease the energy loss in electric power system.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention implements design.
Detailed description of the invention
As it is shown in figure 1, distance of the present invention, the reactive-load compensation method of many load buses wire electric power system, now it is described for Typical Representative between two center switch stations 1,2:
First, second center switch station 1,2 is each responsible for respective power supply area, the leading-out terminal at first, second center switch station 1,2 respectively constitutes respective wire electric power system, wire electric power system is connected by the interconnection switch 4,4.1,4.2 at interconnection switch station 3,3.1,3.2, and interconnection switch station 3 is disposed in the centre position of the spacing at first, second center switch station 1,2；When wire electric power system is properly functioning, the interconnection switch 4 at interconnection switch station 3 is off, wire electric power system is respectively provided with multiple load buses 1.1,2.1 etc. according to design requirement, and the end of incoming cables at first, second center switch station 1,2 is connected with 35kV power system respectively.
Calculate the first, second center switch station 1,2 overhead transmission line length each and between bilateral interconnection switch station 3,3.1,3.2 and cable run length respectively, then calculate the electrical centre position of overhead transmission line and cable run capacity current over the ground described in respective bilateral, fuser station 1.2,1.22,2.2,2.22 is set in respective bilateral electrical centre position；All step-down substations in switchyard, interconnection switch station, fuser station and electric power system centered by load bus of the present invention；When described electrical centre position is positioned at certain load bus position (or near certain load bus), fuser station i.e. may be provided at load bus, let-down stations at this load bus becomes selected fuser station, has the most not only been easy to manage but also save the construction cost of fuser station.
The principle combined with dispersion compensation according to centralized compensation:
Described centralized compensation is: (1), calculate the reactive power capacity of twolink capacity current over the ground between the first 1 to bilateral interconnection switch station, center switch station 3 and 3.1；(2) the reactive power capacity of twolink capacity current over the ground between the second 2 to bilateral interconnection switch station, center switch station 3 and 3.2, is calculated；(3) first, second center switch station 1,2, is calculated respectively to the reactive power capacity of the transmission line of electricity capacity current over the ground between corresponding power system；(4), bus bar side at first, second center switch station 1,2 arranges dynamic reactive compensation device 1.3,2.3 and implements lagging reactive power and compensate respectively.Dynamic reactive compensation device 1.3 lagging reactive power capacity be between this 1 to bilateral adjacent interconnection switch station, center switch station 3 and 3.1 the 30% of two sections of transmission line of electricity capacity current capacity with this center switch station 1 to 35kV power system transformer substation transmission line of electricity capacity current capacity sum；Dynamic reactive compensation device 2.3 lagging reactive power capacity be between this 2 to bilateral adjacent interconnection switch station, center switch station 3 and 3.2 the 30% of two sections of transmission line of electricity capacity current capacity with this center switch station 2 to 35kV power system transformer substation transmission line of electricity capacity current capacity sum.
Described dispersion compensation is: calculates first, second center switch station 1, the reactive power capacity of 2 to bilateral interconnection switch station 3,3.1,3.2 transmission line of electricity capacity current over the ground respectively, then arranges constant reactance device 1.4,1.44,2.4,2.44 in respective fuser station 1.2,1.22,2.2,2.22 bus bar side and implement lagging reactive power compensation；Centered by constant reactance device 1.4 lagging reactive power capacity the 70% of switchyard 1 to interconnection switch station 3 transmission line of electricity capacity current reactive power capacity；Centered by constant reactance device 2.4 lagging reactive power capacity the 70% of switchyard 2 to interconnection switch station 3 transmission line of electricity capacity current reactive power capacity；Centered by constant reactance device 1.44 lagging reactive power capacity the 70% of switchyard 1 to interconnection switch station 3.1 transmission line of electricity capacity current reactive power capacity；Centered by constant reactance device 2.44 lagging reactive power capacity the 70% of switchyard 2 to interconnection switch station 3.2 transmission line of electricity capacity current reactive power capacity.
Claims (1)
1. a distance, the reactive-load compensation method of many load buses wire electric power system, it is characterised in that: carry out as steps described below:
The first step, design described distance, many load buses wire electric power system time, according to the power load distributing of many load buses, rationally determine center switch station, the position at interconnection switch station；Drawing of center switch station position consideration power supply point connects, supply load scope, supply load size, power supply distance factor；Described interconnection switch station is disposed in adjacent two centre positions, center switch station；Distance, many load buses wire electric power system arranges multiple center switch station and interconnection switch station according to design requirement, time properly functioning, the interconnection switch at interconnection switch station is off, and each center switch station radius of electricity supply is the half of the spacing at two adjacent center switch stations；
Second step, the overhead transmission line length calculated between each center switch station and adjacent interconnection switch station, cable run length, and calculate the electrical centre position of described line-to-ground capacity current, arranging fuser station in described electrical centre position, the reactive-load compensation that described fuser station is electric power system provides equipment position；
3rd step, the principle combined with dispersion compensation according to centralized compensation；
Described centralized compensation is: calculate the reactive power capacity of each center switch station extremely adjacent interconnection switch station line-to-ground capacity current, bus bar side at each center switch station is implemented lagging reactive power by dynamic reactive compensation device and is compensated, and lagging reactive power capacity is that 30% and this center switch station of this center switch station to bilateral adjacent interconnection switch station transmission line of electricity capacity current capacity are to power system transformer substation transmission line of electricity capacity current capacity sum；
Described center switch station, interconnection switch station, fuser station belong to load bus, including other load buses, all there is electrical equipment in each load bus, when the method for operation of equipment changes, also the power factor of center switch station bus is had influence in certain limit, therefore the bus bar side at center switch station arranges dynamic reactive compensation device, it is achieved centralized compensation；
Described dispersion compensation is: calculate the reactive power capacity of each center switch station extremely adjacent interconnection switch station transmission line of electricity capacity current over the ground, implementing lagging reactive power in respective fuser station bus bar side by constant reactance device to compensate, lagging reactive power capacity is that this center switch station is to the 70% of adjacent interconnection switch station transmission line of electricity capacity current.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610366684.6A CN106026119B (en) | 2016-05-30 | 2016-05-30 | Over long distances, the reactive-load compensation method of more load bus wire electric power systems |
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| CN201610366684.6A CN106026119B (en) | 2016-05-30 | 2016-05-30 | Over long distances, the reactive-load compensation method of more load bus wire electric power systems |
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| CN106026119A true CN106026119A (en) | 2016-10-12 |
| CN106026119B CN106026119B (en) | 2018-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181265A (en) * | 2017-07-11 | 2017-09-19 | 刘儒水 | Distribution line one-point or multi-point reactive-load compensation method and device |
| CN110289617A (en) * | 2019-07-03 | 2019-09-27 | 厦门理工学院 | A kind of building harmonic compensation method, terminal device and storage medium |
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| JPH10240362A (en) * | 1997-02-06 | 1998-09-11 | Asea Brown Boveri Ab | Method and device for controlling capacitor device of parallelly connected static compensator |
| CN101872969A (en) * | 2010-07-14 | 2010-10-27 | 吉林省电力有限公司电力科学研究院 | Capacitive grounding current distributed compensation method and device for medium-voltage power supply system |
| CN202503293U (en) * | 2012-03-12 | 2012-10-24 | 青海电力科学试验研究院 | Dynamic reactive power compensation device for long-distance transmission line of power grid |
| CN103078329A (en) * | 2013-02-05 | 2013-05-01 | 江苏科能电力工程咨询有限公司 | Output reactive compensation analysis method for long-distance 200kV submarine cable of offshore wind plant |
| CN104767210A (en) * | 2015-04-08 | 2015-07-08 | 广西诺思贝电气股份有限公司 | Reactive collaborative compensation system and method of power distribution network low voltage circuit |
-
2016
- 2016-05-30 CN CN201610366684.6A patent/CN106026119B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10240362A (en) * | 1997-02-06 | 1998-09-11 | Asea Brown Boveri Ab | Method and device for controlling capacitor device of parallelly connected static compensator |
| CN101872969A (en) * | 2010-07-14 | 2010-10-27 | 吉林省电力有限公司电力科学研究院 | Capacitive grounding current distributed compensation method and device for medium-voltage power supply system |
| CN202503293U (en) * | 2012-03-12 | 2012-10-24 | 青海电力科学试验研究院 | Dynamic reactive power compensation device for long-distance transmission line of power grid |
| CN103078329A (en) * | 2013-02-05 | 2013-05-01 | 江苏科能电力工程咨询有限公司 | Output reactive compensation analysis method for long-distance 200kV submarine cable of offshore wind plant |
| CN104767210A (en) * | 2015-04-08 | 2015-07-08 | 广西诺思贝电气股份有限公司 | Reactive collaborative compensation system and method of power distribution network low voltage circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181265A (en) * | 2017-07-11 | 2017-09-19 | 刘儒水 | Distribution line one-point or multi-point reactive-load compensation method and device |
| CN107181265B (en) * | 2017-07-11 | 2019-06-18 | 刘儒水 | Distribution line one-point or multi-point reactive-load compensation method and device |
| CN110289617A (en) * | 2019-07-03 | 2019-09-27 | 厦门理工学院 | A kind of building harmonic compensation method, terminal device and storage medium |
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| CN106026119B (en) | 2018-05-22 |
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Address after: 450003 Zhengzhou Jinshui Road, Henan, No. 109 Patentee after: Yellow River Survey Planning and Design Research Institute Co., Ltd. Address before: 450003 Zhengzhou Jinshui Road, Henan, No. 109 Patentee before: Yellow River Engineering Consulting Co., Ltd. |