CN105162126B - Region voltage control method in AVC systems is adjusted a kind ofly - Google Patents
Region voltage control method in AVC systems is adjusted a kind ofly Download PDFInfo
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- CN105162126B CN105162126B CN201510523827.5A CN201510523827A CN105162126B CN 105162126 B CN105162126 B CN 105162126B CN 201510523827 A CN201510523827 A CN 201510523827A CN 105162126 B CN105162126 B CN 105162126B
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Abstract
Region voltage control method in AVC systems the invention discloses a kind of is adjusted, specifically includes following steps：(1) setting in the region has n strip 110kV buses, records father's 110kV busbar voltages U in real time110, the i-th strip 110kV buses to 220kV transformer stations idle Qi；(2) the bound U of the i-th strip 110kV busbar voltages is obtainedimax、UiminAnd this bus is to the equivalent impedance X of 220kV transformer stationsi；(3) voltage request of the i-th strip 110kV buses to father's 110kV buses is calculated(4) count in n strip 110kV buses, meet the ratio δ % shared by the sub- 110kV buses of step (3) condition, be controlled according to the rule of agreement.The present invention is while regulation is become more meticulous, it is contemplated that the practical operation situation of load and the larger branch of radius of electricity supply, can be very good to reduce main transformer regulation number, realizes the optimizing regulation of voltage in a wider context.
Description
Technical field
Region voltage control method in AVC (automatism voltage control) system the present invention relates to a kind of is adjusted, belongs to power train
System operation and control technology field.
Background technology
Area power grid radially, is characterized in using 220kV transformer stations as power supply point, is supplied for several following 110/35kV
Electricity, form subregion, the grid structure of burst power supply.This is just determined if 220kV root node voltages are incorrect, will be likely to lead
Cause the busbar voltage large area with section it is out-of-limit.
In order to ensure that single station voltage is qualified, regulation can also be passed through by adjusting the main transformer or capacitor singly stood
The main transformer of root node, the former belongs to local modulation strategy, does not account for the voltage condition of the overall situation, has certain blindness,
Zone of reasonableness is also unable to reach after virtually adding the regulation number of plant stand equipment, or even the regulation of 110kV transformer stations or is being adjusted
Vibrated during section, cause device frequent movement；The latter can reach the tap switch of regulation main transformer as few as possible,
Reach the regulation voltage level of maximum magnitude, while can be avoided regulation vibration when the multiple main transformers of multiple transformer stations are adjusted.
It can be seen that before single station voltage control is carried out, first judge that whether normal be adjusted again of region voltage level is appropriate
's.If region voltage is universal partially high/low, the main transformer of root node is adjusted, carries out single station voltage control again on this basis.
The method for adjusting region voltage to control at present is the 110kV buses for the 110kV plant stands for counting 220kV main transformers institute band
Voltage out-of-limit number, after this number exceedes certain threshold value, then starting region voltage controls, and adjusts 220kV main transformers.But
This method regulation threshold value setting is easy to influence regulating effect, for the small numbers of area of 110kV buses, to cross the threshold
Value is to be relatively easy to, but for the more bus of 110kV bus numbers, is just less susceptible to enter the control strip
Part, it is impossible to realize the regulation relatively to become more meticulous；This method have ignored influence of the current idle and reactance to voltage out-of-limit simultaneously,
The influence of the branch or the long branch of supply path of load weight to regulating effect can not be reflected.Traditional region voltage control
Method processed is the out-of-limit situation by judging the mono- buses stood of 110kV, and this can make Rule of judgment shortage become more meticulous, while this method
Influence of the current idle and reactance to voltage out-of-limit is have ignored, the branch or supply path that can not reflect load weight compare
Influence of the long branch to regulating effect.
Technical term is explained：
220kV change medium voltage side 110kV bus abbreviation father's 110kV buses of volume tri-；
The referred to as sub- 110kV buses of the 110kV buses of 110kV plant stands.
The content of the invention
In view of the deficienciess of the prior art, region voltage in AVC systems it is an object of the present invention to provide a kind of is adjusted to control
Method, while regulation is become more meticulous, it can be very good to reduce main transformer regulation number, realize the optimization of voltage in a wider context
Regulation.
To achieve these goals, the present invention is to realize by the following technical solutions：
The present invention's adjusts region voltage control method in AVC systems a kind ofly, that is, judges father's 110kV busbar voltage antithetical phrases
The method of the enabling capabilities size and control of 110kV busbar voltages, specifically includes following steps：
(1) setting in the region has n strip 110kV buses, records father's 110kV busbar voltages U in real time110, the i-th strip 110kV
Idle Q of the bus to 220kV transformer stationsi；
(2) the bound U of the i-th strip 110kV busbar voltages is obtainedimax、UiminAnd this bus is to 220kV transformer stations
Equivalent impedance Xi；
(3) voltage request of the i-th strip 110kV buses to father's 110kV buses is calculated
(4) count in n strip 110kV buses, father's 110kV busbar voltages meet the sub- 110kV buses institute of step (3) condition
The ratio δ % accounted for, are controlled according to following rule：
(1) if, the father 110kV busbar voltages of 220kV plant stands can meet sub- 110kV busbar voltage inequality simultaneously
Constraint, then into single stand control pattern；
(2) if, the father 110kV busbar voltages of 220kV plant stands can meet 80% sub- 110kV busbar voltage
Formula constrains, then into single stand control pattern；
(3) if, father's 110kV busbar voltages of 220kV plant stands get over δ % sub- 110kV busbar voltage inequality it is upper
Limit constraint, and constrained without the lower limit for violating inequality, then region voltage is higher, carries out region voltage control；
(4) if, under father's 110kV busbar voltages of 220kV plant stands sub- 110kV for getting over δ % busbar voltage inequality
Limit constraint, and constrained without the upper limit for violating inequality, then region voltage is relatively low, carries out region voltage control；
(5) if, father's 110kV busbar voltages of 220kV plant stands get over δ % sub- 110kV busbar voltage inequality it is upper
Limit constraint, but the bus for the lower limit constraint for violating inequality be present, then remove QiXiMaximum and Uimax-UiminMinimum bus, then
Continue whether statistics has the bus of more lower limit, if it does remain, then illustrating that voltage is normal in the region, it is not necessary to carry out region
Voltage controls, and otherwise region voltage is higher, carries out region voltage control；
(6) if, under father's 110kV busbar voltages of 220kV plant stands sub- 110kV for getting over δ % busbar voltage inequality
Limit constraint, but the bus for the upper limit constraint for violating inequality be present, then remove QiXiMaximum and Uimax-UiminMinimum bus, then
Continue whether statistics has the bus of the more upper limit, if it does remain, then illustrating that voltage is normal in the region, it is not necessary to carry out region
Voltage controls, and otherwise region voltage is relatively low, carries out region voltage control.
The present invention is while regulation is become more meticulous, it is contemplated that load and larger (namely the equivalent impedance X of radius of electricity supplyiIt is larger)
Branch practical operation situation, can be very good reduce main transformer regulation number, realize in a wider context voltage optimization adjust
Section.
Brief description of the drawings
Fig. 1 is 220kV plant stand father 110kV and the sub- 110kV buses schematic diagram of 110kV plant stands.
Embodiment
To be easy to understand the technical means, the inventive features, the objects and the advantages of the present invention, with reference to
Embodiment, the present invention is expanded on further.
When the 110kV busbar voltages of 110kV plant stands in region are universal higher or relatively low, root node 220kV main transformers are adjusted
The voltage for improving the 110kV buses of medium voltage side is to reduce number of equipment action, a kind of important means of adjustment region voltage.
Traditional region voltage control method is the out-of-limit situation by judging the mono- buses stood of 110kV, and this can make judgement
Condition, which lacks, to become more meticulous, while this method have ignored current idle and reactance to the influence of voltage out-of-limit, can not reflect negative
The influence of the branch of load-carrying or the long branch of supply path to regulating effect.
The present invention proposes a kind of new region voltage control method, become more meticulous regulation while, it is contemplated that load and
The practical operation situation of the larger branch of radius of electricity supply, it can be very good to reduce main transformer regulation number, realize in a wider context
The optimizing regulation of voltage.
It is as follows referring to Fig. 1, specific method：
There is 5 strip 110kV bus in the region, if i-th busbar voltage bound is respectively UimaxAnd Uimin, this mother
Line to the equivalent impedance of 220kV transformer stations be Xi, idle is QiIf the voltage of father's 110kV buses of 220kV plant stands can be simultaneously
Meet the bound of 5 strip 10kV busbar voltages, then this area's voltage is not higher or relatively low, that is to say, that if following
Formula is set up simultaneously, then the region voltage is not necessarily higher or relatively low.
In formula, U110For the voltage of father's 110kV buses.
If voltage is higher or relatively low in region, the inequality overwhelming majority above can not meet.
The present invention judge root node voltage whether can the cores of branch chapelet 110kV busbar voltages be by calculating child node
The requirement to father's 110kV busbar voltages of voltage, and the basis for estimation of traditional region voltage control is sub- 110kV busbar voltages
Out-of-limit situation, both is inherently different.
A kind of method for judging that region voltage is higher or relatively low proposed by the present invention, the core of this method is to judge root section
Point voltage whether can branch chapelet 110kV busbar voltages, mainly by calculate child node voltage to father's 110kV busbar voltages
It is required that and then see father 110kV busbar voltages whether in the restriction range of each sub- 110kV busbar voltages；Consider load weight
Branch or the long branch of supply path, so as to realize the independent control to both of these case.
General principle of the present invention according to power system, theoretically solves and how to judge that region voltage is higher or inclined
The problem of low, the voltage out-of-limit that can preferably tell the 110kV buses of 110kV plant stands are not conforming to for root node voltage actually
Suitable or single station voltage control problem, while the branch long to the heavy branch of load or supply path can also take area
Other regulation measure.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (1)
1. region voltage control method in AVC systems is adjusted a kind ofly, it is characterised in that specifically include following steps：
(1) setting in the region has n strip 110kV buses, records father's 110kV busbar voltages U in real time110, the i-th strip 110kV buses
Idle Qi；
(2) the bound U of the i-th strip 110kV busbar voltages is obtainedimax、UiminAnd this bus to 220kV transformer stations etc.
It is worth impedance Xi；
(3) voltage request of the i-th strip 110kV buses to father's 110kV buses is calculated
(4) count in n strip 110kV buses, father's 110kV busbar voltages meet shared by the sub- 110kV buses of step (3) condition
Ratio δ %, are controlled according to following rule：
(1) if, the father 110kV busbar voltages of 220kV plant stands can meet n strips 110kV busbar voltage inequality simultaneously about
Beam, then into single stand control pattern；
(2) if, the father 110kV busbar voltages of 220kV plant stands can meet 80% sub- 110kV busbar voltage inequality about
Beam, then into single stand control pattern；
(3) if, father's 110kV busbar voltages of 220kV plant stands get over δ % sub- 110kV busbar voltage inequality the upper limit about
Beam, and constrained without the lower limit for violating inequality, then region voltage is higher, carries out region voltage control；
(4) if, father's 110kV busbar voltages of 220kV plant stands get over δ % sub- 110kV busbar voltage inequality lower limit about
Beam, and constrained without the upper limit for violating inequality, then region voltage is relatively low, carries out region voltage control；
(5) if, father's 110kV busbar voltages of 220kV plant stands get over δ % sub- 110kV busbar voltage inequality the upper limit about
Beam, but the bus for the lower limit constraint for violating inequality be present, then remove QiXiMaximum and Uimax-UiminMinimum bus, is further continued for
Whether statistics has the bus of more lower limit, if it does remain, then illustrating that voltage is normal in the region, it is not necessary to carry out region voltage
Control, otherwise region voltage is higher, carries out region voltage control；
(6) if, father's 110kV busbar voltages of 220kV plant stands get over δ % sub- 110kV busbar voltage inequality lower limit about
Beam, but the bus for the upper limit constraint for violating inequality be present, then remove QiXiMaximum and Uimax-UiminMinimum bus, is further continued for
Whether statistics has the bus of the more upper limit, if it does remain, then illustrating that voltage is normal in the region, it is not necessary to carry out region voltage
Control, otherwise region voltage is relatively low, carries out region voltage control；
If there is 5 strip 110kV bus in the region, if i-th busbar voltage bound is respectively UimaxAnd Uimin, this bus
Equivalent impedance to 220kV transformer stations is Xi, idle is QiIf the voltage of father's 110kV buses of 220kV plant stands can expire simultaneously
The bound of 5 strip 10kV busbar voltages of foot, then this area's voltage is not higher or relatively low, that is to say, that if with lower inequality
Set up simultaneously, then the region voltage is not necessarily higher or relatively low；
In formula, U110For the voltage of father's 110kV buses；
The crimping medium voltage side 110kV bus abbreviation father's 110kV buses of 220kV tri-；The referred to as sub- 110kV of the 110kV buses of 110kV plant stands
Bus.
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| CN105720584B (en) * | 2016-04-13 | 2018-06-29 | 国电南瑞科技股份有限公司 | A kind of AVC saves ground and coordinates the optimum allocation method that the province based on integer programming during controlling adjusts reactive command |
| CN105743100B (en) * | 2016-04-13 | 2018-09-28 | 国电南瑞科技股份有限公司 | A kind of AVC provinces coordinate on ground to adjust the optimal decision method of side reactive apparatus in control |
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| CN101764404B (en) * | 2009-12-25 | 2012-06-20 | 清华大学 | Method for judging coordination running state between provincial and local regions in coordination voltage control between provincial and local regions |
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