CN102810862A - Method for delamination and subregion of extra-high voltage receiving-end power grid - Google Patents
Method for delamination and subregion of extra-high voltage receiving-end power grid Download PDFInfo
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- CN102810862A CN102810862A CN2012103016286A CN201210301628A CN102810862A CN 102810862 A CN102810862 A CN 102810862A CN 2012103016286 A CN2012103016286 A CN 2012103016286A CN 201210301628 A CN201210301628 A CN 201210301628A CN 102810862 A CN102810862 A CN 102810862A
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Abstract
The invention specifically discloses an optimization method for a delamination and a subregion of an extra-high voltage receiving-end power grid. The method comprises that 1) the delamination is carried out for a high-end power grid, and the high-end power grid is divided into different gradations according to a voltage class from high to low; 2) the subregion is carried out for the power grid in the same grade, and each subregion is ensured to be in the same voltage class; 3) electric energy supply in one subregion of a lower class can be collected into one or a plurality of power supply points in a higher class of the power grid, and the subregion is carried out for the higher class of power grid, et cetera; and 4) each subregion in each class is ensured to be independent and alternated mutually. The method has the beneficial effects that by the adoption of a power grid pyramid model, a complexity of an extra-high voltage and receiving-end power grid model is effectively simplified, the problem of the delamination and the subregion is clear, a base for a further research on operation performance of the receiving-end power grid before and after the delamination and the subregion is established, and technical support is provided for the induction and development of the extra-high voltage power grid.
Description
Technical field
The present invention is specifically related to the method that a kind of ultra high voltage is held the electrical network layering and zoning.
Background technology
Along with the continuous development of electric power system and a large amount of construction of 500kV transmission line, and the continuous formation of new 500kV-220kV electromagnetic looped network, electromagnetic looped network has become the important accident potential that influences the power system safety and stability operation.And in case break down, very easily cause power outage on a large scale, customer interrupted, the loss that loss is loaded, interruption duration brought all far surpass common power system operation mode.Held electrical network to realize layering and zoning to ultra high voltage, untie ultra high voltage and held the electromagnetic looped network between the power transmission network, can effectively be limited the short circuit current in the electrical network, be beneficial to and carry out accident treatment and trend control, given full play to the transmission of electricity advantage of extra-high voltage grid.Exist 500kV ~ 220kV electromagnetic looped network in the many places of China, carried out the layering and zoning computation schemes through evaluation indexes such as trend, stability analysis, capacity of short circuit and the calculating of net damage in succession in recent years.Yet traditional layering and zoning method mainly depends on operating personnel's practical experience, electrical network layering and zoning strategy lack of complete, system and scheme.
Summary of the invention
For solving the shortcoming that prior art exists, the invention provides the method that a kind of ultra high voltage is held the electrical network layering and zoning.
In conjunction with being held electrical network layering and zoning pyramid principle, the present invention sets up a kind of pyramid model of electrical network layering and zoning, concrete steps following:
1) high-end electrical network is carried out layering, from high to low high-end electrical network is divided into different levels according to electric pressure, the layering principle comprises: the stable limit that guarantees not weaken main trend section; Guarantee rack safety, one held two and above 500kV contact point should be arranged in the big zone of electrical network, three and above 500kV main transformer, should have two passages or three 500kV circuits to connect each other between each Da Qu at least;
2), comprise according to the area principle of every layer of electrical network to carrying out subregion with the one-level electrical network; Guarantee reliable power supply, held in each subregion of electrical network with one or several 500kV transformer stations as main power supply, and cooperate the inner high power station in this area, in the district, supply power through one or more 220kV load-center substation; There are power supply, voltage to support in each subregion, have voltage, idle regulating power in each power supply zone, possess the generating set or the dynamic reactive compensation device of a constant volume in each power supply zone; Have mutual enabling capabilities between the regional power grid, adopt the automatic safety device of prepared auto restart, low-frequency low-voltage load shedding; Partition scheme is taken into account subordinate's mains supply reliability;
3) supply of electrical energy of next stage subregion can converge to one or more power supply points of upper level electrical network, and the electrical network of upper level is carried out subregion, by that analogy;
4) guarantee that each subregion of each grade is separate but subsequent use each other.
In step 2) in power supply point be meant power plant or transformer station.
The abstract model of each the layer network wiring after the described layering; Be expressed as with graph theory method: with the power supply point in the original electrical network of " point " representative; Supply of electric power relation between " limit " between the connection " point " representes at 2 is omitted some switchgears on the circuit, network configuration abstract model G (V simultaneously; E), wherein V representes node, E representative edge.
The abstract model of each the layer network wiring after the described layering, use the method representation of framework to be: the information framework is divided into " limit groove " and " some groove ", and wherein each " limit groove " comprises initial point position, title, length, the model of every circuit; " some groove " comprises position, title, electric pressure, the installed capacity of each node.
After the stable limit that described assurance does not weaken main cross sections is meant and is held electrical network to take the layering power supply plan; Should make major network have enough security and stability and power supply reliability, not weaken the electrical link and the stable feed limit of main passway for transmitting electricity and main cross sections and system.Reasonably electric network composition is the basis of power system safety and stability operation, and the target rack should have bigger disturbance rejection ability, and satisfies the relevant safety and stability standard of regulation in " guide rule ".
Described assurance rack safety satisfies a 500kV transformer station full cut-off or a 500kV line fault, is unlikely to cause the local system off-the-line.Satisfy the 500kV and the 220kV electromagnetic looped network of above-mentioned condition, can consider the layering operation.
The reliable power supply of described assurance is the reliability to guarantee that the user supplies power in each relatively independent power supply zone, and the trend that network configuration should be able to adapt under the different running method in the district changes, and possesses certain flexibility.
Should have power supply, voltage to support in described each subregion, held electrical network to take the switched-mode power supply scheme after, reactive power compensation should be a principle with layering and zoning and in-situ balancing.Each power supply zone planted agent has voltage, idle regulating power, has qualified voltage levvl to guarantee the bus in the power supply zone.Each power supply zone planted agent possesses the generating set or the dynamic reactive compensation device of a constant volume as far as possible, improving the idle enabling capabilities of dynamic electric voltage, and satisfies the peak regulation and the spinning reserve requirement of whole electrical network.
Have certain mutual enabling capabilities between the described regional power grid, held electrical network layering and zoning power supply after, should have corresponding accident between the different zones and support ability.When electrical network needs, can adopt automatic safety devices such as prepared auto restart, low-frequency low-voltage load shedding, improve the fail safe of operational outfit, to improve the power supply reliability of whole electrical network.
Described partition scheme should be taken into account subordinate's mains supply reliability; Held electrical network layering and zoning scheme can not weaken subordinate's power supply reliability; Should combine the adjustment of 110kV power system operating mode to take all factors into consideration like 220kV electrical network switched-mode power supply scheme, guarantee that switched-mode power supply does not weaken 110kV mains supply reliability.
The invention has the beneficial effects as follows: adopted electrical network pyramid model effective simplification ultra high voltage and the complexity of being held electric network model; Make that the layering and zoning problem is clear; For further being held the runnability of electrical network to lay a good foundation before and after the research layering and zoning, for the introducing and the development of extra-high voltage grid provides technical support.
Description of drawings
Electrical network pyramid model before Fig. 1 layering and zoning,
Electrical network pyramid model behind Fig. 2 layering and zoning,
The abstract model that Fig. 3 a Graph-theoretical Approach is represented,
The abstract model that Fig. 3 b frame method is represented,
Among the figure, 1. higher level zone electric network source, 2. subordinate's power supply area, 3. voltage layer section after the layering, X
1. extra-high voltage grid, X
2, the 2nd layer of voltage electrical network, X
N-1. n-1 layer voltage electrical network,
Embodiment
Shown in Figure 2 like Fig. 1: as high-end electrical network to be carried out layering, from high to low high-end electrical network is divided into different levels, comprise extra-high voltage grid X according to electric pressure
1, the 2nd layer of voltage electrical network X
2, n-1 layer voltage electrical network X
N-1, n layer voltage electrical network X
nThe power supply area section 3 after the layering is represented on each plane in the pyramid.
As shown in Figure 2, to carrying out subregion, comprise according to the area principle of every layer of electrical network with the one-level electrical network; Guarantee reliable power supply, held in each subregion of electrical network with one or several 500kV transformer stations as main power supply, and cooperate the inner high power station in this area, in the district, supply power through one or more 220kV load-center substation; There are power supply, voltage to support in each subregion, have voltage, idle regulating power in each power supply zone, possess the generating set or the dynamic reactive compensation device of a constant volume in each power supply zone; Have mutual enabling capabilities between the regional power grid, adopt the automatic safety device of prepared auto restart, low-frequency low-voltage load shedding; Partition scheme is taken into account subordinate's mains supply reliability;
Power supply (can be power plant or transformer station) among Fig. 1 in higher level zone electric network source 1 certain one deck of expression can be certain block supply of undernet, subordinate's power supply area 2 shown in the elliptical region among Fig. 1.To carrying out subregion with the one-level electrical network, behind the layering and zoning, a regional power grid of last layer can be given several zone power supplies of subordinate's electrical network, like X among Fig. 2
N-1The X of subordinate can be given in the zone, the right of layer
nThree block supplies of layer.The supply of electrical energy of a subregion of next stage can converge to one or more power supply points of upper level electrical network, and the electrical network of upper level is carried out subregion, by that analogy; Each subregion of guaranteeing each grade is separate but subsequent use each other.X among Fig. 1 and Fig. 2
2The light areas of layer has provided the instance of a network partition, and before subregion, the network topology structure in monoblock zone is seen the dotted rectangle among Fig. 1; Network topology structure behind the layering and zoning is seen the dotted rectangle of Fig. 2, and the power supply area that linked together by looped network this moment originally has been divided into the isolated area of the equilibrium of supply and demand.This shows, adopt electrical network pyramid model effective simplification ultra high voltage with held electric network model, make that the layering and zoning problem is clear, for further research is laid a good foundation.
Pyramid model has provided macroscopical framework of being held the electrical network layering and zoning; For ease of analytical calculation to electrical network; Set up the abstract model that ultra high voltage is held the power network wiring mode according to graph theory and frame representation; Be the abstract model of each layer network wiring in the pyramid model, to improve to being held the foundation of electrical network layering and zoning model.
Characteristics in conjunction with the power network wiring mode; Be expressed as with graph theory method: with the power supply point (transformer station or power plant) in the original electrical network of " point " representative; Supply of electric power relation between " limit " between the connection " point " representes at 2 is omitted the equipment such as switch on the circuit, building network structure abstract model G (V simultaneously; E), wherein V representes node, E representative edge.The abstract model of a simple network is shown in Fig. 3 a.
In conjunction with being held the electrical network actual conditions, use the method representation of framework to be: its information framework is divided into " limit groove " and " some groove ", and wherein each " limit groove " comprises the initial point position, title, length, model of every circuit etc.; " some groove " comprises position, title, electric pressure, installed capacity of each node etc., shown in Fig. 3 b.Being used in combination of graph theory and information framework is convenient in follow-up calculating the parameter according to needs in the quick locating information framework of network configuration, to improve computational efficiency.
Claims (4)
1. ultra high voltage is held the method for electrical network layering and zoning, it is characterized in that, sets up a kind of pyramid model of electrical network layering and zoning, and its step comprises:
1) high-end electrical network is carried out layering, from high to low high-end electrical network is divided into different levels, guarantee not weaken the stable limit of the power supply area section after the layering during layering according to electric pressure; One held two and above 500kV contact point should be arranged in the big zone of electrical network, three and above 500kV main transformer, should have two passages or three 500kV circuits to connect each other between each Da Qu at least;
2) same level electrical network is carried out subregion again; Guarantee during according to the subregion of every layer of electrical network to be held in each subregion of electrical network with one or several 500kV transformer stations as main power supply; And cooperate the inner high power station in this area, power supply in the district through one or more 220kV load-center substation; There are power supply, voltage to support in each subregion, have voltage, idle regulating power in each power supply zone, possess the generating set or the dynamic reactive compensation device of a constant volume in each power supply zone; Have mutual enabling capabilities between the regional power grid, adopt the automatic safety device of prepared auto restart, low-frequency low-voltage load shedding; Partition scheme is taken into account subordinate's mains supply reliability;
3) supply of electrical energy of next stage subregion can converge to one or more power supply points of upper level electrical network, and the electrical network of upper level is carried out subregion, by that analogy;
4) guarantee that each subregion of each grade is separate but subsequent use each other.
2. ultra high voltage as claimed in claim 1 is held the method for electrical network layering and zoning, it is characterized in that: the power supply point in step 2 is meant power plant or transformer station.
3. ultra high voltage as claimed in claim 1 is held the method for electrical network layering and zoning; It is characterized in that: the abstract model of the network connection of each electric pressure after the described layering, the method for using graph theory to represent is: with the power supply point in the original electrical network of " point " representative, the supply of electric power relation between " limit " between the connection " point " representes at 2; Omit some switchgears on the circuit simultaneously; (V, E), wherein V representes node, E representative edge to network configuration abstract model G.
4. ultra high voltage as claimed in claim 1 is held the method for electrical network layering and zoning; It is characterized in that: the abstract model of the network connection of each electric pressure after the described layering; Use the method for frame representation to be: the information framework is divided into " limit groove " and " some groove ", and wherein each " limit groove " comprises initial point position, title, length, the model of every circuit; " some groove " comprises position, title, electric pressure, the installed capacity of each node.
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Cited By (11)
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| CN103593507A (en) * | 2013-10-17 | 2014-02-19 | 广东电网公司茂名供电局 | Automatic intelligent central deloading method for power grids |
| CN104036343A (en) * | 2014-05-12 | 2014-09-10 | 广东电网公司电网规划研究中心 | Power grid planning method based on multi-core grid construction mode |
| CN104036342A (en) * | 2014-05-12 | 2014-09-10 | 广东电网公司电网规划研究中心 | Power grid planning method based on three-dimensional grid structure grid construction mode |
| CN104218673A (en) * | 2014-08-06 | 2014-12-17 | 国网上海市电力公司 | Automatic intelligent power grid partitioning method |
| CN104331847A (en) * | 2014-11-18 | 2015-02-04 | 国家电网公司 | Power supply zone partitioning method by use of Delaunay triangulation |
| CN104463710A (en) * | 2014-12-19 | 2015-03-25 | 国网冀北电力有限公司唐山供电公司 | Partitioned power supply method considering industrial city load characteristics |
| CN105720570A (en) * | 2014-12-05 | 2016-06-29 | 国家电网公司 | Method for constructing DC power grid structure |
| CN108964036A (en) * | 2018-07-18 | 2018-12-07 | 南方电网科学研究院有限责任公司 | Construction method of bus grid structure of receiving-end power grid |
| CN111162541A (en) * | 2020-01-09 | 2020-05-15 | 清华大学 | Dynamic partitioning method for voltage control of power system |
| CN111435479A (en) * | 2019-01-11 | 2020-07-21 | 国网河北省电力有限公司 | Energy internet-oriented hierarchical ring network planning method for power system |
| CN112952829A (en) * | 2021-04-15 | 2021-06-11 | 广东电网有限责任公司肇庆供电局 | Power system node operation safety evaluation method and device and power system |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103593507A (en) * | 2013-10-17 | 2014-02-19 | 广东电网公司茂名供电局 | Automatic intelligent central deloading method for power grids |
| CN104036342B (en) * | 2014-05-12 | 2017-05-31 | 广东电网公司电网规划研究中心 | A kind of Electric power network planning method based on three-dimensional grid construction network mode |
| CN104036343A (en) * | 2014-05-12 | 2014-09-10 | 广东电网公司电网规划研究中心 | Power grid planning method based on multi-core grid construction mode |
| CN104036342A (en) * | 2014-05-12 | 2014-09-10 | 广东电网公司电网规划研究中心 | Power grid planning method based on three-dimensional grid structure grid construction mode |
| CN104036343B (en) * | 2014-05-12 | 2017-06-06 | 广东电网公司电网规划研究中心 | A kind of Electric power network planning method based on multi-core construction network mode |
| CN104218673A (en) * | 2014-08-06 | 2014-12-17 | 国网上海市电力公司 | Automatic intelligent power grid partitioning method |
| CN104331847A (en) * | 2014-11-18 | 2015-02-04 | 国家电网公司 | Power supply zone partitioning method by use of Delaunay triangulation |
| CN105720570A (en) * | 2014-12-05 | 2016-06-29 | 国家电网公司 | Method for constructing DC power grid structure |
| CN105720570B (en) * | 2014-12-05 | 2018-08-14 | 国家电网公司 | A kind of DC grid rack construction method |
| CN104463710A (en) * | 2014-12-19 | 2015-03-25 | 国网冀北电力有限公司唐山供电公司 | Partitioned power supply method considering industrial city load characteristics |
| CN104463710B (en) * | 2014-12-19 | 2017-07-04 | 国网冀北电力有限公司唐山供电公司 | A kind of switched-mode power supply method of consideration industrial city part throttle characteristics |
| CN108964036A (en) * | 2018-07-18 | 2018-12-07 | 南方电网科学研究院有限责任公司 | Construction method of bus grid structure of receiving-end power grid |
| CN111435479A (en) * | 2019-01-11 | 2020-07-21 | 国网河北省电力有限公司 | Energy internet-oriented hierarchical ring network planning method for power system |
| CN111162541A (en) * | 2020-01-09 | 2020-05-15 | 清华大学 | Dynamic partitioning method for voltage control of power system |
| CN112952829A (en) * | 2021-04-15 | 2021-06-11 | 广东电网有限责任公司肇庆供电局 | Power system node operation safety evaluation method and device and power system |
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Inventor after: Ma Changhui Inventor after: Yang Dong Inventor after: Li Wenbo Inventor after: Jiang Zhe Inventor after: Zhou Chunsheng Inventor after: Li Hongwei Inventor after: Zhang Pengfei Inventor after: Yang Shenquan Inventor after: Wan Gang Inventor after: Zhang Lei Inventor after: Wu Naihu Inventor after: Zhang Dandan Inventor before: Ma Changhui Inventor before: Zhou Chunsheng Inventor before: Zhang Lei Inventor before: Wu Naihu Inventor before: Jiang Zhe |
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Free format text: CORRECT: INVENTOR; FROM: MA CHANGHUI ZHOU CHUNSHENG ZHANG LEI WU NAIHU JIANG ZHE TO: MA CHANGHUI ZHOU CHUNSHENG LI HONGWEI ZHANG PENGFEI YANG SHENQUAN WAN GANG ZHANG LEI WU NAIHU ZHANG DANDAN YANG DONG LI WENBO JIANG ZHE |
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Application publication date: 20121205 |