CN102122822A

CN102122822A - Method for reactively and comprehensively controlling voltage of transformer substation on the basis of previous working day and previous holiday

Info

Publication number: CN102122822A
Application number: CN2010100301176A
Authority: CN
Inventors: 陈栋新; 赵国生
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-07
Filing date: 2010-01-07
Publication date: 2011-07-13

Abstract

The invention provides a method for reactively and comprehensively controlling a voltage of a transformer substation on the basis of a previous working day and a previous holiday. In the method, transformer gear regulation data and reactive load data of the previous working day and the previous holiday are used as auxiliary data for reactively controlling the voltage of the transformer substation; a voltage and a reactive value at the current moment are used as data for starting the voltage reactive control operation; when one or two of the current reactive value and the current voltage exceed limit values, data of the previous working day is called in if the current day is a working day, and data of the previous holiday is called in if the current day is a holiday; the called data is utilized to carry out voltage reactive control judgment; if a judgment result is a short-time interference load and switching or gear regulating oscillation, the time is delayed and the judgment is carried out after a certain time,; or the gear regulation operation or selection operation of an optimal switching group number is carried out and a reorganization capacitor is switched.

Description

Transforming plant voltage reactive integrated control method based on last working day and festivals or holidays

Technical field

The invention belongs to quality of power supply control field, be specifically related to a kind of transforming plant voltage reactive integrated control method based on last working day and festivals or holidays

Background technology

Transforming plant voltage reactive Comprehensive Control (VQC) system is an important content of power department quality of power supply management, it is for improving quality of voltage, keep reactive balance, reducing network loss has great significance, present newly-built transformer station all requires to equip VQC, the implementation of current voltage power-less Comprehensive Control mainly contains that employing realizes based on the VQC module of comprehensive automation system of transformer substation daemon software that load tap changer is regulated and the straighforward operation of reactive power compensation capacitor switching and adopt special VQC to realize the local operation of load tap changer adjusting and reactive power compensation capacitor switching, and this special device communicates by network and comprehensive automation system of transformer substation.

No matter be the VQC control of adopting the VQC control that the backstage automated software realizes or adopting VQC independently to realize, its controlling schemes mostly adopts based on traditional voltage power-less nine district figure control strategies and 13 of the refinement differentiation that makes progress thus, seven districts and five district figure control strategies that 17 district figure control strategies and alligatoring downwards develop, there is not big improvement on all these administrative division map control strategy principles, it only is the difference of regional degree of refinement, these control methods all need the given voltage of user, parameters such as idle bound customization and control priority, these parameters have determined the control effect, just can not obtain desired result as the customer parameter setting is unreasonable, even parameter setting rationally also exists the following problem:

(1) number of times that fluctuates the voltage of most of transformer stations, idle every day is more, only rely on the foundation of the threshold of setting as switching capacitance and adjusting tap, cause load tap changer adjusting every day number of times frequently to reach the too much phenomenon of capacitor switching number of times easily, and the inrush phenomenon of each switching operation of electric capacity and gate-dividing super-voltage switching devices and electric capacity all are harmful to, and can cause the shortening greatly in its useful life.

(2) when the working region is positioned at the boundary vicinity in two zones, can cause adjusting tap and switching capacitance to operate both influences each other obviously, make idle originally in qualified zone owing to regulate tap and cause and be lower than threshold or be higher than threshold value, cause the capacitor switching operation of following, on the contrary still.

(3) owing to there are above two problems, make the operations staff of some transformer station go wrong for fear to take on responsibility manual adjustments tap when simply not using its tap regulatory function and adopting essential the adjusting, even electric capacity automatic switching function do not use yet, and allows capacitor group hanging net operation or just carry out the operation of capacitor group manual switching after obtaining dispatching command always.

The main cause that above problem occurs is that control method is based on all that current load or burden without work and magnitude of voltage control, do not consider the variation tendency of load and voltage, when the interference that a short-term occurs just may cause the switching concussion of an electric capacity or the switching reforming phenomena of transformer gear; And other some control methods also only are to have done some theoretic discussions as regulating based on the voltage power-less adjusting of fuzzy control theory, based on the voltage power-less of artificial intelligence, and its practicality is relatively poor.

Short-term load forecasting is to work out the power market transaction plan, arrange the foundation of power system operating mode, for many years, Chinese scholars has proposed the method for multiple short-term load forecasting (as time series method, linear broad sense extrapolation, neural network algorithm, Wavelet Transformation Algorithm etc.), and some short-term load forecasting softwares have been developed, in some area power grids, obtained application, regulate number of times as if the switching frequency and the transformer gear that then can reduce electric capacity in the voltage power-less control that load forecasting method correctly can be applied to transformer station greatly, the useful life of prolongation equipment, avoid the generation of electric power system catastrophic failure, some scholars also propose ultra-short term is introduced the comprehensive Regulation Control of transformer station, but because present short-term forecast method is influenced (as temperature by several factors, weather conditions such as sleet, similar working day, abnormal conditions), make it predict the outcome and exist certain error, this transforming plant voltage reactive control that was applied to when the day before yesterday that predicts the outcome also will be existed certain error, even the judgement and the action of mistake can occur.Because voltage power-less control must could be carried out when load reaches controlled condition really, so load prediction results can only be as the assistant criteria of carrying out action and the main criterion that can not move as execution.And only load prediction results is used to prevent that as this out-of-limit possible duration though the generation of short time throw in-of oscillation is feasible and can reduce vibration effectively, but the value that predicts the outcome of seeming is not high, and because the influence of the adjustment of load tap changer, the transformer station's day voltage curve that obtains has lost value basically.

In view of above problem, the present invention proposes a kind of utilize that last working day/festivals or holidays, the transformer gear was regulated data and load or burden without work data control assistant criteria as voltage power-less, utilize the novel transforming plant voltage reactive controlling schemes of the voltage power-less value of current time as voltage power-less control action start-up criterion and main criterion, because big especially change is not arranged and does not have big random load to enter suddenly under the situation in weather conditions, two adjacent working days are (as Monday, the similarity of part throttle characteristics Tuesday) will be higher than present load prediction results value, and because proxima luce (prox. luc) load or burden without work data and tap are regulated information as the assistant criteria of adjusting, even have big predicated error also can not produce bigger influence, and the tap gear is regulated data in the present invention and the capacitor switching situation is introduced in the switching criterion the influence value of load or burden without work to the control result.

Summary of the invention

The present invention proposes a kind of last working day transformer gear of utilizing and regulate data and the load or burden without work data are controlled assistant criteria as transforming plant voltage reactive, utilize the novel transforming plant voltage reactive controlling schemes of the voltage power-less value of current time as voltage power-less control action start-up criterion.This concrete controlling schemes is as follows: Mon-Fri weekly is defined as working day, Saturday, Sunday and official holiday are as festivals or holidays, transformer gear and the idle data of working as transformer station's day before yesterday are carried out record, per 15 minutes or 30 o'clock minutes are as a time period, each power of adding up of idle data constantly in this section is averaged, as idle value in this time period, can obtain or 48 uniformly-spaced discrete idle set of values like this at 96, Q={Q when the day before yesterday ₁, Q ₂..., Q ₉₆And transformer gear data set n={n ₁, n ₁₂n ₃..., n ₉₆; these data are as the voltage power-less control assistant criteria of next working day or festivals or holidays; voltage when the day before yesterday; idle currency data are as current entry condition and main criterion of carrying out voltage power-less control; if the voltage of current transformer station; one or two in idle exceeds its limit value; start-up criterion then; as being the same day on working day; consult last working days certificate; when voltage exceeds the upper lower limit value of qualification; look into last workaday transformer gear information; as the gear adjustment information being arranged in corresponding time period of current time or the most contiguous two time periods and same adjustment trend (raising or downward modulation) being arranged with current; think that then the interference of non-short-term load causes; should adjust; start then and adjust the vibration determining program; see in time period of this adjustment or contiguous time period and whether oscillatory occurences takes place (after raising; within 30 minutes, be adjusted downward to original gear) at gear; if oscillatory occurences takes place; consult the adjustment process duration; the necessity of adjusting is analyzed; if necessity is little; then in the duration of oscillation section, do not do the gear adjustment; if essential the adjustment; then adjust the transformer gear; if the dead-beat phenomenon occurs in the contiguous time period of gear adjustment, then carry out and regulate the transformer gear position operation, if in this time period and contiguous time period the gear adjustment is arranged; then carry out the delay process of a period of time; avoid interference and the voltage fluctuation of very short time influence after, judge again, as being the same day festivals or holidays; consult last festivals or holidays of data, carry out same adjustment and judge;

When current load or burden without work transfinites, start the capacitor switching determining program, consult the uniformly-spaced discrete idle set of values of last working day or festivals or holidays, Q={Q ₁, Q ₂..., Q ₉₆; seek current do not throw electric capacity respectively organize number and capacity thereof (as will throw the electric capacity operation); as load or burden without work data and current data in corresponding time period of current time or the most contiguous two time periods tangible deviation is arranged; then think of short duration disturbance load; process again through after the certain time-delay; if the load or burden without work data oscillatory occurences in corresponding time period of current time or the most contiguous two time periods takes place; when need excise once more within a short period of time after the electric capacity input; then wouldn't drop into to escape duration of oscillation Duan Houzai and process; if being difficult two kinds of situations then thinks and need carry out capacitor switching; at current several groups of electric capacity and the corresponding capacity that does not drop into; calculate the possibility duration after it drops into respectively; when calculating prolongeding time; consult the later transformer gear incremental data of current time; the data movement of the reactive power that these data are caused is incorporated in the idle data computation of switching capacitance; preventing the adjusted idle phenomenon that exceeds standard of voltage takes place; to drop into that group electric capacity input of back duration the longest (in this time not switching capacitance) then; in computational process if continuous a plurality of time periods in idle qualified; it is idle defective a time period to occur; there are a plurality of time periods idle when qualified then again; when defective section idle out-of-limit when not being too serious; can be similar to and think that this time period is to disturb section, get rid of.

Compared with prior art, the present invention has the following advantages:

1, the load forecasting method that proposes of the present invention has only adopted transformer station's discretization load or burden without work collection and the transformer gear data set of last working day and festivals or holidays, and data processing is simple, and with ought the day before yesterday similarity height.

2, in the voltage powerless control method that proposes of the present invention only with the transformer gear data sets of last working day and festivals or holidays and load or burden without work collection assistant criteria as the voltage power-less controlling schemes, and with current voltage and load or burden without work data starting criterion as controlling schemes, like this, reduced the adverse effect that the predicated error of load forecasting method is brought.

3, introduced the criterion that disturbance load is judged and capacitor switching vibrates and the gear adjusting is vibrated in short-term in the controlling schemes of the voltage powerless control method of the present invention's proposition, can reduce the transformer gear significantly and regulate number of times and compensation condenser switching frequency, improve service life of equipment.

4, when capacitor switching, introduced the longest electric capacity selection scheme of operating time behind the switching in the controlling schemes of the voltage powerless control method of the present invention's proposition, the load or burden without work change that simultaneously the load tap changer adjustment is caused is introduced capacitor switching and is selected in the computing formula, avoids occurring because of causing the operation of switching subsequently of capacitor after the tap adjustment.

Description of drawings

Fig. 1 for the present invention propose based on last working day and festivals or holidays data the controlling schemes flow chart of transforming plant voltage reactive integrated control method;

Embodiment

Shown in Figure 1 based on last working day and festivals or holidays data the controlling schemes of transforming plant voltage reactive integrated control method in, at first to current date for being to judge first working day or festivals or holidays, if equipment has just put into operation and be in the Mon-Fri one day the same day, it then is first working day, be in Saturday, Sunday or legal festivals and holidays one day the same day if put into operation, and then is first festivals or holidays; If first working day or festivals or holidays then will be every 15 minutes (or 30 minutes) as time periods, each power of adding up of idle data constantly in this section is averaged, as idle value in this time period, can obtain like this as the uniformly-spaced discrete idle set of values of 96 points (or 48 points) of the day before yesterday, Q={Q ₁, Q ₂..., Q ₉₆, write down the transformer gear data in this time period simultaneously, obtain the transformer gear data set n={n of this day at last ₁, n ₁₂n ₃..., n ₉₆, if having in a period of time twice and so that last time, the transformer gear was adjusted, the gear information and the time interval of adjusting given record as the attachment data file at every turn, use when transferring the files vibration in order to judging.Nine district figure controlling schemes are adopted in voltage power-less control in first working day and festivals or holidays, if current date is non-first working day, then adopt current voltage of above method real time record and reactive power data, and with every 15 minutes (or 30 minutes) as a time period, write down mean value and the transformer gear and the transition information thereof of load or burden without work in this time period, if in this time period, have twice and so that last time, the transformer gear was adjusted, the gear information and the time interval adjusted are given record as the attachment data file at every turn, use when transferring the files vibration in order to judging, timing will begin to carry out each quarter once record with integral point at interval, if the restriction of one or two overshoot is arranged in current voltage or the idle real time data, (can get 1～3 minute through after the of short duration time-delay, line voltage and idle transient swing when escaping fault) still exceed restriction, then entry condition is set up, enter the operating criterion determining program, as being the same day on working day, call in last working day the load or burden without work collection and transformer gear data set make the following judgment: (1) is if voltage has exceeded limit value, only consult last workaday transformer gear data, as the gear adjustment information is arranged and with current when same adjustment trend (raising or downward modulation) is arranged in corresponding time period of current time or the most contiguous two time periods, think that then the interference of non-short-term load causes, should adjust, restart the gear adjustment determining program that whether vibrates, see whether this adjustment oscillatory occurences takes place in a short period of time (after raising, within 30 minutes, be adjusted downward to original gear) at gear, if oscillatory occurences takes place, continue interval information with reference to additional gear data message and adjustment process, the necessity of adjusting is analyzed, if necessity is little, then in the duration of oscillation section, do not do the gear adjustment, if essential the adjustment, then adjust the transformer gear, if the dead-beat phenomenon occurs in the contiguous time period of gear adjustment, then carry out and regulate the transformer gear position operation, if no gear adjustment in this time period and contiguous time period, then carry out the delay process of a period of time, avoid interference and the voltage fluctuation of very short time influence after, judge again, as being the same day festivals or holidays, utilize the gear data set of last festivals or holidays, carry out same gear adjustment and judge.(2) if current load or burden without work exceeds limit value, through after the of short duration time-delay, then enter the capacitor switching determining program, call in the uniformly-spaced discrete idle set of values of last working day or festivals or holidays, Q={Q ₁, Q ₂..., Q ₉₆; if need drop into operation; then seek current do not throw electric capacity respectively organize number and capacity thereof; as load or burden without work data and current data in corresponding time period of current time or the most contiguous two time periods tangible deviation is arranged; then think of short duration disturbance load; process again through after the certain time-delay; if the load or burden without work data in corresponding time period of current time or the most contiguous two time periods have oscillatory occurences to take place; in the time of promptly need excising once more through within a short period of time after obtaining dropping into after calculating; then wouldn't drop into electric capacity escapes duration of oscillation Duan Houzai and processes; if being difficult two kinds of situations then thinks and need carry out capacitor switching; at current several group capacitors and the corresponding capacity thereof that does not drop into; calculate the possibility duration after it drops into respectively; when calculating prolongeding time; utilize the later transformer gear incremental data of current time simultaneously; the data movement of the reactive power that these data are caused is incorporated in the idle data computation of switching capacitance; preventing the adjusted idle phenomenon that exceeds standard of voltage takes place; to drop into that group electric capacity input of back duration the longest (in this time not switching capacitance) then; in computational process if continuous a plurality of time periods in idle qualified; it is idle defective a time period to occur; there are a plurality of time periods idle when qualified then again; when defective section idle out-of-limit when not being too serious; can be similar to and think that this time period is to disturb section, get rid of; Excise the capacitor operational circumstances for needs, handle and judge according to the method identical with carrying out electric capacity input operation.

Claims

One kind based on last working day and festivals or holidays load data the transforming plant voltage reactive integrated control method, it is characterized in that, it utilizes last working day transformer gear to regulate data and the load or burden without work data are controlled assistant criteria as transforming plant voltage reactive, the voltage power-less value of utilizing current time is as voltage power-less control action start-up criterion and main criterion, concrete controlling schemes is as follows: Mon-Fri weekly is defined as working day, Saturday, Sunday and official holiday are as festivals or holidays, transformer gear and the idle data of working as transformer station's day before yesterday are carried out record, per 15 minutes or 30 minutes are as a time period, each power of adding up of idle data constantly in this section is averaged, as idle value in this time period, can obtain uniformly-spaced disperse idle set of values and transformer gear data sets like this at 96 or 48 when the day before yesterday, these data are as the voltage power-less control assistant criteria of next working day or festivals or holidays, voltage when the day before yesterday, idle currency data are as current entry condition and main criterion of carrying out voltage power-less control, if the voltage of current transformer station, one or two in idle exceeds its limit value, start-up criterion then, as being the same day on working day, consult last working days certificate, when voltage exceeds the upper lower limit value of qualification, look into last workaday transformer gear information, as the gear adjustment information being arranged in corresponding time period of current time or the most contiguous two time periods and same adjustment trend (raising or downward modulation) being arranged with current, think that then the interference of non-short-term load causes, should adjust, start then and adjust the vibration determining program, see whether this adjustment in the time period of this time period or vicinity oscillatory occurences takes place, if oscillatory occurences takes place, consult the adjustment process duration, the necessity of adjusting is analyzed, if necessity is little, then in the duration of oscillation section, do not do the gear adjustment, if essential the adjustment, then adjust the transformer gear, if the dead-beat phenomenon occurs in the contiguous time period of gear adjustment, then carry out and regulate the transformer gear position operation, if in this time period and contiguous time period the gear adjustment is arranged, then carry out the delay process of a period of time, avoid interference and the voltage fluctuation of very short time influence after, judge again, as being the same day festivals or holidays, consult last festivals or holidays of data, carry out same adjustment and judge; When current load or burden without work transfinites, start the capacitor switching determining program, consult the uniformly-spaced discrete idle set of values of last working day or festivals or holidays, Q={Q ₁, Q ₂..., Q ₉₆; seek current do not throw electric capacity respectively organize number and capacity thereof (as will throw the electric capacity operation); as load or burden without work data and current data in corresponding time period of current time or the most contiguous two time periods tangible deviation is arranged; then think of short duration disturbance load; process again through after the certain time-delay; if the load or burden without work data oscillatory occurences in corresponding time period of current time or the most contiguous two time periods takes place; in the time of can need excising once more within a short period of time after the electric capacity input; then wouldn't drop into to escape duration of oscillation Duan Houzai and process; if being difficult two kinds of situations takes place then to think and need carry out capacitor switching; at current several groups of electric capacity and the corresponding capacity that does not drop into; calculate the possibility duration after it drops into respectively; when calculating prolongeding time; consult the later transformer gear incremental data of current time; the data movement of the reactive power that these data are caused is incorporated in the idle data computation of switching capacitance; preventing the adjusted idle phenomenon that exceeds standard of voltage takes place; to drop into that group electric capacity input of back duration the longest (in this time not switching capacitance) then; in computational process if continuous a plurality of time periods in idle qualified; it is idle defective a time period to occur; there are a plurality of time periods idle when qualified then again; when defective section idle out-of-limit when not being too serious; can be similar to and think that this time period is to disturb section, get rid of.
2. as claimed in claim 1 based on last working day and festivals or holidays load data the transforming plant voltage reactive integrated control method, it is characterized in that nine traditional district figure control methods are adopted in the control of the voltage power-less of first working day and festivals or holidays.