CN109713680A - Based on the area power grid voltage quickly regulating method for improving Sensitivity Method - Google Patents
Based on the area power grid voltage quickly regulating method for improving Sensitivity Method Download PDFInfo
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- CN109713680A CN109713680A CN201910181570.8A CN201910181570A CN109713680A CN 109713680 A CN109713680 A CN 109713680A CN 201910181570 A CN201910181570 A CN 201910181570A CN 109713680 A CN109713680 A CN 109713680A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The present invention provides a kind of based on the area power grid voltage quickly regulating method for improving Sensitivity Method, based on throwing each point voltage sensibility caused by moving back by area power grid reactive apparatus, using the improvement sensitivity of each voltage monitoring point of area power grid as sequence, it carries out area power grid reactive apparatus and throws the accurate quick predict of each point voltage moved back, it more accurate can must predict that area power grid each point voltage change is stepped back in each reactive apparatus throwing, and then show that the area power grid voltage for meeting specific voltage needs adjusts optimal case, a kind of quick area power grid voltage adjusting suggestion is provided for operations staff, solves the operation status that dispatcher is depended in actual electric network pressure regulation unduly, it can ensure the safe and stable operation of area power grid voltage.
Description
Technical field
The present invention relates to network voltage regulation technology field more particularly to a kind of area power grids based on improvement Sensitivity Method
Voltage quickly regulating method.
Background technique
With the transnational interconnection of electric system, the scale of power grid is increasing, for being sent to the power grid of foreign locale, is signing
When ordering cooperation agreement, often the voltage to boundary plant stand and power factor propose specific index request, this part power grid point
Belong to the respective scheduling institution of two countries, lacks mutual load and power supply prediction, be similar to black box in other side's power grid opposite to each other
Son, traffic department need the variation to black box power grid to make quick response, to meet the index request of boundary plant stand.Therefore,
The voltage security stable operation of transnational power grid is maintained, it is particularly important for transnational power transmission.
However, dispatcher is difficult to take effective for this black box power grid and international cooperation area power grid
Measure carries out fast dispatch and decision.In the prior art, the BPA emulation mode based on the actual electric network method of operation is excessively cumbersome,
It is difficult to complete in a short time.
Summary of the invention
The present invention provides a kind of area power grid voltage quickly regulating method based on improvement Sensitivity Method, to solve existing electricity
Net voltage adjusting method is excessively cumbersome, it is difficult to complete in a short time, and since transnational opposite side power grid is due to unpredictable electricity
The problem of boundary node voltage caused by pressure and reactive power fluctuation is unsatisfactory for protocol requirement for a long time.
Area power grid voltage quickly regulating method provided by the invention based on improvement Sensitivity Method, comprising:
The reactive apparatus and reactive compensation capacity for counting area power grid plant stand, including the electricity to power grid plant stand each in area
Container and reactor and power plant mutually carry out Classifying Sum with under-excitation ability late；
Minimum point is run by OCS system searching boundary node voltage history, according to OCS system data, is emulated based on BPA
The backtracking of area power grid trend is carried out, the idle capacitive apparatus of single plant stand is put into, the idle capacitive apparatus of the plant stand is recorded and is incremented by throwing
The Initial Voltage Value and voltage value of fashionable each voltage detecting point；
Calculate the voltage sensibility that the idle capacitive apparatus of the plant stand throws each voltage monitoring point moved back；
Highest point is run by OCS system searching boundary node voltage history, according to OCS system data, is emulated based on BPA
The backtracking of area power grid trend is carried out, the idle induction equipment of single plant stand is put into, the idle induction equipment of the plant stand is recorded and is incremented by throwing
The Initial Voltage Value and voltage value of fashionable each voltage detecting point；
Calculate the voltage sensibility that the plant stand induction equipment throws each voltage monitoring point moved back；
When area power grid investment is capacitive reactive power, the improved of jth plant stand is moved back in No. i-th substation capacitors throwing
Voltage sensibility are as follows:
When area power grid investment is lagging reactive power, the improved of jth plant stand is moved back in No. i-th transformer substation reactor throwing
Voltage sensibility are as follows:
Wherein,For voltage sensibility,To calculateInitial voltage,For the power grid moment actual voltage
Value；
Generate the sensitive degree series of improvement of each plant stand reactive apparatus switching of area power grid；
The area power grid voltage regulation scheme for meeting voltage requirements is generated according to the sensitive degree series of improvement.
In one embodiment of the invention, voltage sensibilityWith following relational expression:
Wherein, k is the integer greater than 1.
In one embodiment of the invention, further includes: j-th after the capacitive reactive power equipment investment of comprehensive p plant stand
The voltage value of plant stand are as follows:
In one embodiment of the invention, further includes: j-th after the inductive reactive power equipment investment of comprehensive p plant stand
The voltage value of plant stand are as follows:
In one embodiment of the invention, electric according to the area power grid that sensitive degree series generation meets voltage requirements is improved
Pressure Adjusted Option includes: to acquire that j node voltage is made to reach desired value using following optimization algorithmMost simple pressure regulation scheme:
Wherein,For the final voltage per unit value of i-th of voltage monitoring point.
Area power grid voltage quickly regulating method provided by the invention based on improvement Sensitivity Method, it is idle with area power grid
Based on each point voltage sensibility caused by equipment throwing is moved back, using the improvement sensitivity of each voltage monitoring point of area power grid as sequence,
It carries out area power grid reactive apparatus and throws the accurate quick predict of each point voltage moved back, more accurate can must predict that each reactive apparatus is thrown
Area power grid each point voltage change is stepped back, and then show that the area power grid voltage for meeting specific voltage needs adjusts optimal case,
A kind of quick area power grid voltage adjusting suggestion is provided for operations staff, actual electric network pressure regulation is solved and depends on dispatcher unduly
Operation status, can ensure the safe and stable operation of area power grid voltage.
Specific embodiment
Original area power grid voltage adjusting method carries out capacitor or reactor according to the operating experience of dispatcher
Throwing is moved back, it is difficult to ensure that the voltage of area power grid each point is not out-of-limit while reaching pressure regulation purpose.If carried out using emulation mode
Aid decision, needs to carry out the backtracking of electric network swim and voltage, simulation software be difficult quickly to recall the network voltage at the moment with
Reactive power distribution.The embodiment of the present invention provides a kind of area power grid voltage quickly regulating method based on improvement Sensitivity Method, can
The not accurate enough drawback of traditional sensitivity method voltage prediction is effectively solved, this method comprises:
S1: the reactive apparatus and reactive compensation capacity of statistics area power grid plant stand, including to power grid plant stand each in area
Capacitor and reactor and power plant late mutually and under-excitation ability carries out Classifying Sum.
It is for statistical analysis to the reactive apparatus and reactive capability of area power grid 220kV or more, including to each in area
The capacitor and reactor and power plant of a power grid plant stand mutually carry out Classifying Sum with under-excitation ability late.Specify area power grid
Voltage monitoring point, these voltage monitoring points include the plant stand of reactive apparatus.
S2: running minimum point by OCS system searching boundary node voltage history, according to OCS system data, is based on BPA
Emulation carries out the backtracking of area power grid trend, puts into the idle capacitive apparatus of single plant stand, records the idle capacitive apparatus of the plant stand and pass
Increase the Initial Voltage Value and voltage value of each voltage detecting point when putting into.
S3: the voltage sensibility that the plant stand induction equipment throws each voltage monitoring point moved back is calculated.
Boundary node voltage history is searched by OCS system (grid operating monitoring system) and runs minimum point, according to OCS system
System data carry out the backtracking of area power grid trend based on BPA emulation and put into the idle capacitive of single plant stand on the basis of this mode
Equipment (substation capacitors, the slow Xiang Yunhang in power plant), record the idle capacitive apparatus of the plant stand be incremented by investment when, each voltage detecting
The Initial Voltage Value of pointAnd voltage value, wherein m is the number in power plant, and n is power transformation
The number stood,For m power plant initial voltage,For n substation's initial voltage.It is idle
It is as shown in table 1 that each monitoring point voltage is moved back in equipment throwing.
Each monitoring point voltage is moved back in the throwing of 1 i substation capacitors of table
The voltage increment average value of each voltage monitoring node is calculated, as No. i-th substation capacitors throw each point moved back
Voltage sensibility, No. i-th substation capacitors throw the voltage sensibility for moving back jth plant standWith following relational expression:
Wherein, k is the integer greater than 1.
Then the idle capacitive apparatus of other plant stands is successively calculated again throws each voltage monitoring point voltage sensibility moved back.
S4: running highest point by OCS system searching boundary node voltage history, according to OCS system data, is based on BPA
Emulation carries out the backtracking of area power grid trend, puts into the idle induction equipment of single plant stand, records the idle induction equipment of the plant stand and pass
Increase the Initial Voltage Value and voltage value of each voltage detecting point when putting into.
S5: the voltage sensibility that the plant stand induction equipment throws each voltage monitoring point moved back is calculated.
Similarly, highest point is run by OCS system searching boundary node voltage history, it is imitative based on BPA according to OCS data
True progress area power grid trend backtracking puts into idle induction equipment (substation's reactance of single plant stand on the basis of this mode
Device, power plant leading phase operation), it successively calculates the idle induction equipment of plant stand and throws each voltage monitoring point voltage sensibility moved back.
S6: when area power grid investment is capacitive reactive power, changing for jth plant stand is moved back in No. i-th substation capacitors throwing
Into voltage sensibility are as follows:
When area power grid investment is lagging reactive power, the improved of jth plant stand is moved back in No. i-th transformer substation reactor throwing
Voltage sensibility are as follows:
Wherein,For voltage sensibility,To calculateInitial voltage,For the power grid moment actual voltage
Value.
It is often changed with the variation of initial voltage based on calculating of the above method to sensitivity, this is because
Area power grid is still networked system, and initial voltage is excessively high or too low, can all make reactive power " excessive ", when initial voltage compared with
Gao Shi, the area power grid capacitive reactive power (investment capacitor or the slow Xiang Yunhang of generator) of the capacity such as increase, since voltage is high,
The idle ratio for flowing to neighbouring power grid is big, reduces to the uplift scope of this ground voltage, that is, the electricity of local each voltage monitoring point
Press sensitivity that will reduce.Similarly, when initial voltage is lower, area power grid lagging reactive power (the investment electricity of the capacity such as increase
Anti- or Generation in Leading Phase Operation), the lagging reactive power that neighbouring power grid " overflows into " local power grid increases, so that local each voltage prison
The voltage sensibility of measuring point reduces.
Therefore, the embodiment of the present invention defines a kind of improved voltage sensibility, can more acurrate expression area power grid it is idle
The practical fluctuation amplitude of equipment switching and each point voltage, it may be assumed that
When area power grid investment is capacitive reactive power, the improved of jth plant stand is moved back in No. i-th substation capacitors throwing
Voltage sensibility are as follows:
When area power grid investment is lagging reactive power, the improved of jth plant stand is moved back in No. i-th transformer substation reactor throwing
Voltage sensibility are as follows:
Wherein,For voltage sensibility,To calculateInitial voltage,For the power grid moment actual voltage value.
S7: the sensitive degree series of improvement of each plant stand reactive apparatus switching of area power grid are generated.
The sensitive degree series of improvement of each plant stand reactive apparatus switching of area power grid can be generated by step S1-S6, it is right
In jth plant stand, the sensitive degree series of voltage improvement are as follows:
S8: the area power grid voltage regulation scheme for meeting voltage requirements is generated according to the sensitive degree series of improvement.
When adjusting area power grid voltage, for the voltage requirements for meeting specific plant stand, the idle of multiple plant stands can be taken to set
It is standby to throw the comprehensive pressure regulation of setback row, calculate with emulation experience have shown that, the voltage variety of each monitoring node is not each plant stand tune
Press the simple cumulative of sensitivity, equally, the voltage sensibility respectively monitored be with the voltage of the point increases and decreases and it is stepping, when
When needing lifting system voltage, the voltage sensibility of each monitoring point is gradually decreased with the sensitivity that is stepped up of voltage.When need
When reducing system voltage, the voltage sensibility of each monitoring point is gradually decreased with the sensitivity that gradually reduces of voltage.Comprehensive nothing
It is smaller than by the simple accumulated value of sensitivity that function equipment throws the increase and decrease of the voltage caused by moving back.
Therefore, in the embodiment of the present invention, the voltage of j-th of plant stand after the capacitive reactive power equipment investment of comprehensive p plant stand
Value are as follows:
The voltage value of j-th of plant stand after the inductive reactive power equipment investment of comprehensive p plant stand are as follows:
Being acquired using following optimization algorithm makes j node voltage reach desired valueMost simple pressure regulation scheme:
Wherein,For the final voltage per unit value of i-th of voltage monitoring point, guarantee after p walks adjusting pressure measure,
The voltage of each node of system does not get over bound, the especially node of reactive apparatus switching.
Case verification
The changing based on the area power grid voltage quickly regulating method for improving Sensitivity Method provided through the embodiment of the present invention
It is as shown in table 2 into Calculation of Sensitivity voltage value and simulation value comparison.
Table 2 is compared by improving Calculation of Sensitivity voltage value and simulation value
| Plant stand | Calculated value | Simulation value | Deviation range | Deviation percent |
| Substation 1 | 235.9 | 233.7 | 0.009326 | 0.93% |
| Substation 2 | 237.49 | 237.2 | 0.001221 | 0.12% |
| Power plant 1 | 239.99 | 239 | 0.004125 | 0.41% |
| Power plant 2 | 247.24 | 245.4 | 0.007442 | 0.74% |
In conclusion it is provided by the invention based on the area power grid voltage quickly regulating method for improving Sensitivity Method, with ground
It is sensitive with the improvement of each voltage monitoring point of area power grid based on each point voltage sensibility caused by electric network reactive-load equipment throwing in area's is moved back
Degree is sequence, carries out area power grid reactive apparatus and throws the accurate quick predict of each point voltage moved back, and more accurate can must be predicted each
Area power grid each point voltage change is stepped back in reactive apparatus throwing, and then show that the area power grid voltage for meeting specific voltage needs is adjusted
Optimal case provides a kind of quick area power grid voltage adjusting suggestion for operations staff, it is excessive to solve actual electric network pressure regulation
The operation status for relying on dispatcher, can ensure the safe and stable operation of area power grid voltage.
The above is only a specific embodiment of the invention, is made skilled artisans appreciate that or realizing this hair
It is bright.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (5)
1. a kind of based on the area power grid voltage quickly regulating method for improving Sensitivity Method characterized by comprising
The reactive apparatus and reactive compensation capacity for counting area power grid plant stand, including the capacitor to power grid plant stand each in area
And reactor and power plant mutually carry out Classifying Sum with under-excitation ability late；
Minimum point is run by OCS system searching boundary node voltage history, according to OCS system data, is carried out based on BPA emulation
Area power grid trend backtracking, put into the idle capacitive apparatus of single plant stand, record the idle capacitive apparatus of the plant stand be incremented by investment when
Each voltage detecting point Initial Voltage Value and voltage value；
Calculate the voltage sensibility that the idle capacitive apparatus of the plant stand throws each voltage monitoring point moved back；
Highest point is run by OCS system searching boundary node voltage history, according to OCS system data, is carried out based on BPA emulation
Area power grid trend backtracking, put into the idle induction equipment of single plant stand, record the idle induction equipment of the plant stand be incremented by investment when
Each voltage detecting point Initial Voltage Value and voltage value；
Calculate the voltage sensibility that the plant stand induction equipment throws each voltage monitoring point moved back；
When area power grid investment is capacitive reactive power, No. i-th substation capacitors throw the improved voltage for moving back jth plant stand
Sensitivity are as follows:
When area power grid investment is lagging reactive power, No. i-th transformer substation reactor throws the improved voltage for moving back jth plant stand
Sensitivity are as follows:
Wherein,For voltage sensibility,To calculateInitial voltage,For the power grid moment actual voltage value；
Generate the sensitive degree series of improvement of each plant stand reactive apparatus switching of area power grid；
The area power grid voltage regulation scheme for meeting voltage requirements is generated according to the sensitive degree series of improvement.
2. according to claim 1 based on the area power grid voltage quickly regulating method for improving Sensitivity Method, feature exists
In voltage sensibilityWith following relational expression:
Wherein, k is the integer greater than 1.
3. according to claim 1 based on the area power grid voltage quickly regulating method for improving Sensitivity Method, feature exists
In, further includes: the voltage value of j-th of plant stand after the capacitive reactive power equipment investment of comprehensive p plant stand are as follows:
4. according to claim 3 based on the area power grid voltage quickly regulating method for improving Sensitivity Method, feature exists
In, further includes: the voltage value of j-th of plant stand after the inductive reactive power equipment investment of comprehensive p plant stand are as follows:
5. according to claim 4 based on the area power grid voltage quickly regulating method for improving Sensitivity Method, feature exists
According to improving sensitive degree series and generating, to meet the area power grid voltage regulation scheme of voltage requirements include: using following optimization
Algorithm, which acquires, makes j node voltage reach desired valueMost simple pressure regulation scheme:
Wherein,For the final voltage per unit value of i-th of voltage monitoring point.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113131473A (en) * | 2021-04-22 | 2021-07-16 | 云南电网有限责任公司电力科学研究院 | Parameter sensitivity-based method for calculating available transmission capacity of power transmission system |
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| WO2018115431A1 (en) * | 2016-12-23 | 2018-06-28 | Danmarks Tekniske Universitet | Combined active and reactive power control in an operation of a wind farm |
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| CN103346572A (en) * | 2013-07-29 | 2013-10-09 | 国家电网公司 | Reactive intelligent control method for power grid based on sensitivity and multiple Agents |
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| CN105048473A (en) * | 2015-08-14 | 2015-11-11 | 国家电网公司 | Low-voltage reactive equipment voltage sensitivity statistics method in automatic voltage control of transformer station |
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| CN113131473B (en) * | 2021-04-22 | 2023-04-07 | 云南电网有限责任公司电力科学研究院 | Parameter sensitivity-based method for calculating available transmission capacity of power transmission system |
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