CN104967133B - A kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral - Google Patents
A kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral Download PDFInfo
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- CN104967133B CN104967133B CN201510333846.1A CN201510333846A CN104967133B CN 104967133 B CN104967133 B CN 104967133B CN 201510333846 A CN201510333846 A CN 201510333846A CN 104967133 B CN104967133 B CN 104967133B
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- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The present invention relates to a kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral, comprise the following steps：(1) oscillation test is carried out to the susceptance perunit value Bpu signals of voltage regulator output, gain quick regulation is carried out when detecting that voltage regulator output has vibration；(2) if the susceptance perunit value Bpu signal oscillatings of voltage regulator output disappear and continue 30s, gain optimization is carried out to the susceptance perunit value Bpu signals of voltage regulator output；The present invention relates to the normal regulating that a kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral need not intervene SVC, the estimation of capacity of short circuit need not be carried out, the method of closed loop integral is taken to realize the optimization of gain, according to oscillation test and the result of stability monitoring, the whether reasonable simultaneously real-time optimization amount of gain of monitoring amount of gain.
Description
Technical field
The present invention relates to a kind of SVC voltage regulators gain-adaptive control method, and in particular to one kind is accumulated based on closed loop
The SVC voltage regulator gain-adaptive control methods divided.
Background technology
China with power network scale expansion and running environment it is increasingly complicated, in the transforming of key power network, extra-high piezoelectricity
In the construction of net, to improve power grid security, stable and economic operation level, receiving-end system should have enough reactive reserves, especially
It is when receiving-end system has Voltage-stabilizing Problems, it is necessary to be set in the load-center substation of receiving-end system configuration dynamic passive compensation
It is standby.
Static reactive (SVC) voltage regulating device possesses to improve voltage control, improve in high voltage power transmisson system
Static state and transient stability, increase ability to transmit electricity, the damping system of system vibrate, reduce the functions such as power-frequency overvoltage.SVC voltages are adjusted
Regulating device at home and abroad significant and broad prospect of application in transmission system.Voltage regulator gain KG and power network knot
The horizontal event of any change SVC busbar short-circuits such as structure, system operation mode and switching circuit is closely related.If voltage-regulation
The gain of device is unreasonable, and the SVC response times can dramatically increase, and control loop is it is possible that vibration even unstability.
At present, designing the method taken during transmission system SVC voltage regulators gain control is：One is injected by SVC
Small idle step, idle changing value and voltage change are measured, by the change of points of common connection voltage and the idle outputs of SVC
Change to estimate the capacity of short circuit of points of common connection, the increasing of voltage regulator is then estimated according to the capacity of short circuit being calculated
Benefit.This method needs to measure capacity of short circuit by intervening SVC normal idle output.If in nearer electrical areas
There are multiple SVC, the voltage control between each SVC will influence each other, for accurate measurement capacity of short circuit, it is necessary between each SVC
Communication connection is established, to coordinate each SVC gain control.
The content of the invention
In view of the shortcomings of the prior art, it is adaptive to provide a kind of SVC voltage regulator gains based on closed loop integral by the present invention
Answer control method, it is not necessary to intervene SVC normal regulating, it is not necessary to carry out the estimation of capacity of short circuit, take the side of closed loop integral
Method realizes the optimization of gain, and according to oscillation test and the result of stability monitoring, rationally and real-time optimization whether monitoring amount of gain
Amount of gain.
The purpose of the present invention is realized using following technical proposals：
A kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral, it is theed improvement is that, bag
Include：
(1) to the voltage regulator output susceptance perunit value Bpu signals carry out oscillation test, when detect voltage adjust
Section device output carries out gain quick regulation when having vibration；
(2) if the susceptance perunit value Bpu signal oscillatings of voltage regulator output disappear and continue 30s, to the electricity
The susceptance perunit value Bpu signals of adjuster output are pressed to carry out gain optimization.
Preferably, the step (1) includes：
The susceptance perunit value Bpu that (1-1) is exported by bandpass filter to the voltage regulator is filtered processing, obtains
The signal osc0 of vibration can be reflected by taking；Wherein, the frequency of the signal osc0 that can reflect vibration is 5-60Hz；
(1-2) sets the first threshold value and compared with the osc0, the osc0 is judged with the presence or absence of vibration, if depositing
Vibration then obtain width be the osc0 amplitudes exceed first threshold value corresponding to time the first pulse signal simultaneously
Step (1-3) is gone to, the end operation if in the absence of vibration；
(1-3) is integrated to the time between two adjacent zero crossings in the osc0 and is obtained the integral result
Frequency values, step (1-4) is gone to if the frequency values of the integral result are more than 10Hz, is tied if the frequency values are less than 10Hz
Beam operates；
(1-4) integrates to the pulse signal between two adjacent zero crossings in first pulse signal, and will product
Point result is multiplied by proportionality coefficient, so as to obtain the first amount of gain adjustment；
(1-5) is adjusted to the amount of gain of the SVC voltage regulators, and updates the amount of gain, will the SVC
The amount of gain of voltage regulator subtracts first amount of gain adjustment；
(1-6) if renewal after amount of gain in the range of gain limit value, by the amount of gain of the SVC voltage regulators
Take the amount of gain after the renewal；If the amount of gain after renewal is more than the maximum of gain limit value, the SVC voltage-regulations
The gain of device measures the maximum of gain limit value；If the amount of gain after renewal is less than the minimum value of gain limit value, described
The gain of SVC voltage regulators measures the minimum value of gain limit value.
Further, the step (1-2), judges that the osc0 includes with the presence or absence of vibration：Set the first threshold value with
The osc0 is compared, if the amplitude of the osc0 is higher than first threshold value in 150ms, the osc0, which exists, to shake
Swing, if the amplitude of the osc0 is less than first threshold value, and when continuing 150ms, then vibration is not present in the osc0.
Preferably, the step (2) includes：
(2-1) sets the second threshold value and compared with the osc0, if the osc0, which vibrates, disappears and continues 30s,
Then judge to state whether osc0 stablizes, be slowly increased the amount of gain for stating SVC voltage regulators according to step-length if the osc0 is stable
To the maximum of gain limit value, if it is that the osc0 amplitudes exceed second threshold that the osc0 shakinesses rule, which obtains width,
The second pulse signal of value corresponding time simultaneously goes to step (2-2)；Wherein, second threshold value is much smaller than and states first
Threshold value；
(2-2) is integrated to the time between two adjacent zero crossings in the osc0 and is obtained the integral result
Frequency values, step (2-3) is gone to if the frequency values of the integral result are more than 10Hz, is tied if the frequency values are less than 10Hz
Beam operates；
(2-3) integrates to the pulse signal between two adjacent zero crossings in second pulse signal, and will product
Point result is multiplied by proportionality coefficient, so as to obtain the second amount of gain adjustment；
(2-4) is adjusted to the amount of gain of the SVC voltage regulators, and updates amount of gain, will the SVC voltages
The amount of gain of adjuster subtracts second amount of gain adjustment；
(2-5) if renewal after amount of gain in the range of gain limit value, by the amount of gain of the SVC voltage regulators
Take the amount of gain after the renewal；If the amount of gain after renewal is more than the maximum of gain limit value, the SVC voltage-regulations
The gain of device measures the maximum of gain limit value；If the amount of gain after renewal is less than the minimum value of gain limit value, described
The gain of SVC voltage regulators measures the minimum value of gain limit value.
Further, the step (2-1), judging whether the osc0 is stable includes：Set the second threshold value with it is described
Osc0 is compared, if the amplitude of the osc0 is higher than second threshold value, the osc0 is unstable, if the osc0
Amplitude is less than second threshold value in 150ms, then the osc0 is stable.
Further, the gain limit value can be according to the capacity regulating scope of the SVC voltage regulators and described
The points of common connection capacity of short circuit of SVC voltage regulator access systems is set.
Beneficial effects of the present invention：
(1) SVC normal regulating need not be intervened, it is not necessary to carry out the estimation of capacity of short circuit, take the side of closed loop integral
Method realizes the optimization of gain.
(2) when being applied to transmission system set SVC more, it is not necessary to communicated between each SVC controls, can flexibly advantageously
Gain suitable for more set SVC controls.
(3) vibration of SVC voltage regulators can be effectively monitored, and reduces gain rapidly, effectively suppress control vibration,
System is set to recover stable.
(4) it tracking system capacity of short circuit can adaptively change, be automatically the current short-circuit current level of adaptation by gain optimization
Value, it is ensured that system is stable and SVC has good dynamic response characteristic.
Brief description of the drawings
Fig. 1 is a kind of method stream of the SVC voltage regulator gain-adaptive control methods based on closed loop integral of the present invention
Cheng Tu；
Fig. 2 is the program diagram of step in Fig. 1 (1)；；
Fig. 3 is that a kind of SVC voltage regulator gain-adaptives control method based on closed loop integral of the present invention suppresses vibration
Result schematic diagram；
Fig. 4 is the program diagram of step in Fig. 1 (2)；
Fig. 5 is the change diagram of yield value after vibration disappearance in step (2).
Embodiment
The embodiment of the present invention is elaborated below in conjunction with the accompanying drawings.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The all other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Gain-adaptive control method proposed by the present invention based on closed loop integral control is applied to transmission system SVC voltages
The gain control of adjuster, the continuous output for monitoring voltage regulator, detects whether any lasting increasing oscillation be present, its
In, system strength reduce and adjuster still operate in high-gain when increasing oscillation can occur.If detect voltage tune
The increasing oscillation of device output is saved, will constantly reduce gain until vibration disappears.It so can not only protect control loop and work(
Rate system, while the control caused by grid short circuit volume change, system disturbance or irrational adjustment parameter can be avoided
The unstable output of device processed, have and be easy to implement, effectively suppress the superiority such as vibration and optimization dynamic response characteristic.
A kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral, as shown in figure 1, including：
(1) to the voltage regulator output susceptance perunit value Bpu signals carry out oscillation test, when detect voltage adjust
Section device output carries out gain quick regulation when having vibration；
(2) if the susceptance perunit value Bpu signal oscillatings of voltage regulator output disappear and continue 30s, to the electricity
The susceptance perunit value Bpu signals of adjuster output are pressed to carry out gain optimization.
Wherein, the step (1), as shown in Fig. 2 including：
The susceptance perunit value Bpu that (1-1) is exported by bandpass filter to the voltage regulator is filtered processing, obtains
The signal osc0 of vibration can be reflected by taking；Wherein, the frequency of the signal osc0 that can reflect vibration is 5-60Hz；
(1-2) sets the first threshold value and compared with the osc0, the osc0 is judged with the presence or absence of vibration, if depositing
Vibration then obtain width be the osc0 amplitudes exceed first threshold value corresponding to time the first pulse signal simultaneously
Step (1-3) is gone to, the end operation if in the absence of vibration；Wherein, first threshold value can react the spirit of oscillation test
Sensitivity.
Specifically, the step (1-2), judges that the osc0 includes with the presence or absence of vibration：First threshold value and institute are set
State osc0 to be compared, if the amplitude of the osc0 is higher than first threshold value in 150ms, the osc0, which exists, to shake
Swing, if the amplitude of the osc0 is less than first threshold value, and when continuing 150ms, then vibration is not present in the osc0.
(1-3) is integrated to the time between two adjacent zero crossings in the osc0 and is obtained the integral result
Frequency values, step (1-4) is gone to if the frequency values of the integral result are more than 10Hz, is tied if the frequency values are less than 10Hz
Beam operates；
In order to avoid influenceing SVC voltage regulators to the damping actions of low frequency oscillations, distinguish power system oscillation and
Voltage regulator vibration can be realized by measuring the frequency of voltage regulator output vibration, be disappeared when osc0 signals have vibration
Afterwards, step (1-3) will be prohibited to perform.
(1-4) integrates to the pulse signal between two adjacent zero crossings in first pulse signal, and will product
Point result is multiplied by proportionality coefficient, so as to obtain the first amount of gain adjustment；
(1-5) is adjusted to the amount of gain of the SVC voltage regulators, and updates the amount of gain, will the SVC
The amount of gain of voltage regulator subtracts first amount of gain adjustment；
(1-6) if renewal after amount of gain in the range of gain limit value, by the amount of gain of the SVC voltage regulators
Take the amount of gain after the renewal；If the amount of gain after renewal is more than the maximum of gain limit value, the SVC voltage-regulations
The gain of device measures the maximum of gain limit value；If the amount of gain after renewal is less than the minimum value of gain limit value, described
The gain of SVC voltage regulators measures the minimum value of gain limit value.
For example, as shown in figure 3, when system short circuit capacity reduces suddenly, original gain is excessive to cause a certain degree of shake
Swing, SVC voltage regulators quickly reduce gain after detecting vibration, vibrate and are totally constrained after about 400ms, system is again
Again stable state is reverted to.
The step (2), as shown in figure 4, to the osc0 carry out stability monitoring and optimized gain amount principle with it is right
The principle that the osc0 carries out oscillation test is similar, but its threshold value is lower compared with the threshold value of oscillation test, has higher spirit
Sensitivity, including：
(2-1) sets the second threshold value and compared with the osc0, if the osc0, which vibrates, disappears and continues 30s,
Then judge to state whether osc0 stablizes, be slowly increased the amount of gain for stating SVC voltage regulators according to step-length if the osc0 is stable
To the maximum of gain limit value, if it is that the osc0 amplitudes exceed second threshold that the osc0 shakinesses rule, which obtains width,
The second pulse signal of value corresponding time simultaneously goes to step (2-2)；Wherein, second threshold value is much smaller than and states first
Threshold value；
Specifically, the step (2-1), judging whether the osc0 is stable includes：Set the second threshold value with it is described
Osc0 is compared, if the amplitude of the osc0 is higher than second threshold value, the osc0 is unstable, if the osc0
Amplitude is less than second threshold value in 150ms, then the osc0 is stable.
(2-2) is integrated to the time between two adjacent zero crossings in the osc0 and is obtained the integral result
Frequency values, step (2-3) is gone to if the frequency values of the integral result are more than 10Hz, is tied if the frequency values are less than 10Hz
Beam operates；
(2-3) integrates to the pulse signal between two adjacent zero crossings in second pulse signal, and will product
Point result is multiplied by proportionality coefficient, so as to obtain the second amount of gain adjustment；
(2-4) is adjusted to the amount of gain of the SVC voltage regulators, and updates amount of gain, will the SVC voltages
The amount of gain of adjuster subtracts second amount of gain adjustment；
(2-5) if renewal after amount of gain in the range of gain limit value, by the amount of gain of the SVC voltage regulators
Take the amount of gain after the renewal；If the amount of gain after renewal is more than the maximum of gain limit value, the SVC voltage-regulations
The gain of device measures the maximum of gain limit value；If the amount of gain after renewal is less than the minimum value of gain limit value, described
The gain of SVC voltage regulators measures the minimum value of gain limit value.
For example, as shown in figure 5, after vibration disappearance, gain is optimised for a smaller value, and system voltage keeps steady
It is fixed.As capacity of short circuit gradually increases, yield value is also constantly adjusted increasing.
Further, the gain limit value can be according to the capacity regulating scope of the SVC voltage regulators and described
The points of common connection capacity of short circuit of SVC voltage regulator access systems is set.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
The present invention is described in detail with reference to above-described embodiment for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution, and without departing from any of spirit and scope of the invention
Modification or equivalent substitution, it all should cover within the claims of the present invention.
Claims (5)
1. a kind of SVC voltage regulator gain-adaptive control methods based on closed loop integral, it is characterised in that including following step
Suddenly：
(1) oscillation test is carried out to the susceptance perunit value Bpu signals of voltage regulator output, when detecting voltage regulator
Output carries out gain quick regulation when having vibration；
(2) if the susceptance perunit value Bpu signal oscillatings of voltage regulator output disappear and continue 30s, the voltage is adjusted
The susceptance perunit value Bpu signals for saving device output carry out gain optimization；
The step (1) includes：
The susceptance perunit value Bpu that (1-1) is exported by bandpass filter to the voltage regulator is filtered processing, obtains energy
The signal osc0 of enough reflection vibrations；
(1-2) sets first threshold value and compared with the osc0, judges the osc0 with the presence or absence of vibration, if in the presence of shaking
Swing, acquisition width exceedes the first pulse signal of the time corresponding to first threshold value for the osc0 amplitudes and gone to
Step (1-3), the end operation if in the absence of vibration；
(1-3) is integrated to the time between two adjacent zero crossings in the osc0 and is obtained the frequency of the integral result
Value, step (1-4) is gone to if the frequency values of the integral result are more than 10Hz, terminates to grasp if the frequency values are less than 10Hz
Make；
(1-4) is integrated to the pulse signal between two adjacent zero crossings in first pulse signal, and integration is tied
Fruit is multiplied by proportionality coefficient, so as to obtain the first amount of gain adjustment；
(1-5) is adjusted to the amount of gain of the SVC voltage regulators, and updates the amount of gain, will the SVC voltages
The amount of gain of adjuster subtracts first amount of gain adjustment；
(1-6) is if the gain of the SVC voltage regulators is measured institute by the amount of gain after renewal in the range of gain limit value
State the amount of gain after renewal；If the amount of gain after renewal is more than the maximum of gain limit value, the SVC voltage regulators
Gain measures the maximum of gain limit value；If the amount of gain after renewal is less than the minimum value of gain limit value, the SVC electricity
The gain of pressure adjuster measures the minimum value of gain limit value.
2. the method as described in claim 1, it is characterised in that the step (1-2), judge the osc0 with the presence or absence of vibration
Including：First threshold value is set compared with the osc0, if the amplitude of the osc0 is higher than described first in 150ms
Threshold value, then there is vibration in the osc0, if the amplitude of the osc0 is less than first threshold value, and when continuing 150ms, then and institute
State osc0 and vibration is not present.
3. the method as described in claim 1, it is characterised in that the step (2) includes：
(2-1) sets the second threshold value and compared with the signal osc0 that can reflect vibration, if osc0 vibrations disappear
And continue 30s, then judge to state whether osc0 stablizes, be slowly increased if the osc0 is stable according to step-length and state SVC voltage-regulations
The amount of gain of device to gain limit value maximum, if the osc0 shakinesses rule obtain width exceed institute for the osc0 amplitudes
State the second pulse signal of the time corresponding to the second threshold value and go to step (2-2)；Wherein, second threshold value is far small
In stating the first threshold value；
(2-2) is integrated to the time between two adjacent zero crossings in the osc0 and is obtained the frequency of the integral result
Value, step (2-3) is gone to if the frequency values of the integral result are more than 10Hz, terminates to grasp if the frequency values are less than 10Hz
Make；
(2-3) is integrated to the pulse signal between two adjacent zero crossings in second pulse signal, and integration is tied
Fruit is multiplied by proportionality coefficient, so as to obtain the second amount of gain adjustment；
(2-4) is adjusted to the amount of gain of the SVC voltage regulators, and updates amount of gain, will the SVC voltage-regulations
The amount of gain of device subtracts second amount of gain adjustment；
(2-5) is if the gain of the SVC voltage regulators is measured institute by the amount of gain after renewal in the range of gain limit value
State the amount of gain after renewal；If the amount of gain after renewal is more than the maximum of gain limit value, the SVC voltage regulators
Gain measures the maximum of gain limit value；If the amount of gain after renewal is less than the minimum value of gain limit value, the SVC electricity
The gain of pressure adjuster measures the minimum value of gain limit value.
4. method as claimed in claim 3, it is characterised in that the step (2-1), judge the whether stable bags of the osc0
Include：Second threshold value is set compared with the osc0, it is described if the amplitude of the osc0 is higher than second threshold value
Osc0 is unstable, if the amplitude of the osc0 is less than second threshold value in 150ms, the osc0 is stable.
5. the method as described in claim 1 or 3, it is characterised in that the gain limit value can be adjusted according to the SVC voltages
The points of common connection capacity of short circuit of the capacity regulating scope and the SVC voltage regulators access system that save device is set.
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| EP0498553B1 (en) * | 1991-02-05 | 1997-05-28 | Lambda Electronics, Inc. | Adaptive control method for power converters |
| US6970750B2 (en) * | 2001-07-13 | 2005-11-29 | Fisher-Rosemount Systems, Inc. | Model-free adaptation of a process controller |
| CN102157933B (en) * | 2011-03-02 | 2013-06-05 | 华北电力大学 | Design method of stabilizer of power system |
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Address after: 102200 Beijing city Changping District South Shao Zhen Nan Road No. 16 Co-patentee after: NARI Group Co. Ltd. Patentee after: China Electric Prime Technology Co., Ltd. Address before: 102200 Beijing city Changping District South Shao Zhen Nan Road No. 16 Co-patentee before: Nanjing Nari Co., Ltd. Patentee before: China Electric Prime Technology Co., Ltd. |
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