CN105680444B - Power factor control analysis method for power transmission and distribution line - Google Patents
Power factor control analysis method for power transmission and distribution line Download PDFInfo
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- CN105680444B CN105680444B CN201610130524.1A CN201610130524A CN105680444B CN 105680444 B CN105680444 B CN 105680444B CN 201610130524 A CN201610130524 A CN 201610130524A CN 105680444 B CN105680444 B CN 105680444B
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- 230000005611 electricity Effects 0.000 claims abstract description 35
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
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- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a power factor control analysis method for a power transmission and distribution line, which comprises the following steps: the telemetering data is collected through the power monitoring system, and the electricity amount is calculated through the electric energy calculating unit. And determining a calculation model of the loss of the power transmission and distribution line. And carrying out data processing on the calculation model through the electric energy metering device to obtain the power factor of the examination point. The electric energy metering device performs data processing once at intervals of set time. The power factor of the check point is checked. The power factor control analysis method can reasonably calculate and correct the power factors of the power transmission and distribution line according to the structural characteristics of the power transmission line, and improves the power factors of the check points and optimizes the system operation by adopting a reactive power balance adjustment means of hierarchical control and partition local balance.
Description
Technical field
The present invention relates to comprehensive utilization of energy technical field, more particularly to a kind of electric line power factor controlling analysis
Method.
Background technology
Each type load of large size industrial enterprise is perceptual, such as motor, transformer, frequency conversion equipment, idle work(mostly
Rate consumption it is very big, in this way caused by influence to have：It reduces the active power of output of system generator, reduce power transformation and transmission of electricity
The power supply capacity of facility, the loss for increasing supply network, the voltage drop for increasing transmission line of electricity.In view of the height of power factor
It to hair, confession, the making full use of of electrical equipment, saves electric energy and improves quality of voltage important, grid company is for drum
It encourages user and improves power factor, reduce the flowing of circuit reactive power, formulated power factor rewards and punishments regulation：When user power because
When number is less than 0.9, the fine electricity charge of the low power rate of pay this extra are needed according to actual power factor, when the power factor of user is more than
0.9, the corresponding electricity charge for obtaining power supply department are reduced or remitted.Power factor is improved as a result, not only to electric system, to the warp of enterprise
Ji operation is of great importance.
Electric system energy metering device is mounted on the boundary of assets and business scope between electric company and power consumer
Place, the power quality that grid company usually records grid side Electric Energy Tariff Point Metering Device as clearing, count basic data,
And enterprise can not monitor the case where electric energy metering device at grid company critical point in real time.For the power for avoiding by grid company
Factor adjusts electricity charge punishment, and enterprise is using power factor statistical data in this side electric energy metering device as statistics, regulation and control standard.
The electric energy metering device of the enterprise metering numerical value of power factor and electric company during light load in the prior art
The power factor meter numerical quantity of electric energy metering device differ greatly, cause electric line transmission loss larger, waste electric power
The energy causes the utilization rate of electrical equipment not high, and power supply quality and power supply efficiency are poor.
Invention content
A kind of electric line power factor controlling analysis method provided by the present application is solved or is partly solved existing
The electric energy metering device of enterprise the metering numerical value of power factor and electrical energy measurement of electric company during light load fill in technology
The power factor meter numerical quantity set differs greatly, the technical problem for causing electric line transmission loss larger, realizes rationally
The computation model of electric line is established, the metering of electric energy metering device power factor during light load of enterprise is effectively reduced
The power factor meter numerical quantity difference of numerical value and the electric energy metering device of electric company, and the skill of examination point power factor can be improved
Art effect.
This application provides a kind of electric line power factor controlling analysis methods, include the following steps：
Telemetry is acquired by electric power monitoring system and electricity is calculated by electric energy computing unit；
Determine the computation model of the electric line loss；
Data processing is carried out to the computation model by the electric energy metering device, obtains the power factor of examination point；
The time of the electric energy metering device interval setting can carry out the primary data processing；
The power factor of the examination point is verified, the checking procedure is：When the power factor of the examination point
When more than or equal to 0.9, verification is qualified；When the power factor of the examination point is less than 0.9, unqualified, optimal control is verified
The electric line makes the power factor of next examination point be greater than or equal to 0.9.
Preferably, the telemetry includes：The end active-power P of the electric line2, end reactive power
Q2And terminal voltage U2。
Preferably, the electricity includes：Active electrical degree amount and idle electricity；The active electrical degree amount and the nothing
Work(electricity is determined according to electric degree statistical rules；The electric degree statistical rules includes：
When the end active-power P2More than zero, and when the idle direction in end is positive, the telemetry is located at
I quadrant of examination；
When the end active-power P2Less than zero, and when the idle direction in the end is positive, the telemetry
Positioned at II quadrant of examination；
When the end active-power P2Less than zero, and when the idle direction in the end is reversed, the telemetry
Positioned at III quadrant of examination；
When the end active-power P2More than zero, and when the idle direction in the end is reversed, the telemetry
Positioned at IV quadrant of examination.
Preferably, when the telemetry is located at I or IV quadrant of examination, the active electrical degree amount is equal to the end
Hold active-power P2To the integral of the interval time；The idle electricity is equal to the end reactive power Q2Absolute value
To the integral of the interval time；
When the telemetry is located at II or III quadrant of examination, the active electrical degree amount and the idle electricity are all
Equal to 0.
Preferably, the computation model of the electric line loss includes：
The electric line is overhead line and cable mixed power transmission line；
The charge power that the cable generates is QC；
The admittance of the electric line is B, reactance X, resistance R；
The charge power of the electric line
The head end voltage of the electric line is U1；
The head end active power of the electric line is P1；
The head end reactive power of the electric line is Q1。
Preferably, the data handling procedure includes：
Determine the head end voltage U1,
Determine the head end active-power P1；When the telemetry is located at I quadrant of examination, the head end wattful power
RateWhen the telemetry is located at IV quadrant of examination, the head end active power
Determine that the power factor of the examination point, the power factor of the examination point are
Preferably, electric line described in optimal control, including：
Seek the end active-power P in the case of certain loadsIt is specialAnd end reactive power QIt is special；
According to the end reactive power Q2With the end reactive power QIt is specialComparing result, determine regulating measure；
Wherein, in the certain loads, the charge power Q of the electric lineChargingFor fixed value；It is described defeated
The charge power and Capacitance Power that distribution line generates are offseted with reactive loss, the nothing of the electric line head end and end
Work(power is identical, is all QIt is special。
Preferably, working as end reactive power Q described in 0 ＜2End reactive power Q described in ＜It is specialWhen, reduce the power transmission and distribution
The reactive-load compensation at line load end makes the power factor of the examination point be greater than or equal to 0.9；
When the end reactive power QIt is specialEnd reactive power Q described in ＜2When, improve the electric line load side
Power factor；
When the end reactive power QIt is specialWhen ＜ 0, the reactive-load compensation of the electric line load side is reduced, makes described examine
The power factor of epipole is greater than or equal to 0.9.
Preferably, the power factor of the electric line load side is
Preferably, the regulating measure includes：
The electric system of enterprise is divided into 220kV systems, 110kV systems, 35kV systems and 10kV systems, is avoided described
Idle between 220kV systems, 110kV systems, 35kV systems and 10kV systems passes through；
The electric system is centered on the transformer of the 110kV systems, according to the difference of process, the 10kV systems
Voltage class be radiated to each region of the enterprise；In each region, according to the power factor of the examination point
Local compensation；
The 110kV systems adjust idle output by 300MW generating sets, improve the power factor of the examination point；
The region of the 10kV systems is by switched capacitor, adjustment internal synchronization generator, motor reactive power and tune
Section load tap changer is controlled on the spot, reduces idle pass through.
One or more technical solutions provided herein, have at least the following technical effects or advantages：
The calculating of electric line loss is rationally established as a result of the telemetry acquired by electric power monitoring system
Model；By carrying out data processing to computation model, the power factor of examination point is obtained；To which more accurate measure goes out to examine a little
Power factor enterprises power factor is adjusted correspondingly by optimal control electric line, make next examine
The power factor of epipole is greater than or equal to 0.9, even if the power factor of examination point meets appraisal standards requirement.In this way, effectively solving
Determined enterprise in the prior art electric energy metering device metering numerical value and electric company of power factor during light load electricity
The power factor meter numerical quantity of energy metering device differs greatly, and the technical problem for causing electric line transmission loss larger is real
Showed and rationally established the computation model of electric line, effectively reduce the electric energy metering device of enterprise during light load power because
The power factor meter numerical quantity difference of the electric energy metering device of several metering numerical value and electric company, and examination point power can be improved
The technique effect of factor.
Description of the drawings
Fig. 1 is the flow chart of electric line power factor controlling analysis method provided in an embodiment of the present invention.
Fig. 2 is the computation model schematic diagram of electric line provided in an embodiment of the present invention loss.
Fig. 3 is the schematic diagram of electric degree statistical rules provided in an embodiment of the present invention.
Fig. 4 is head end reactive power Q provided in an embodiment of the present invention1With end reactive power Q2Relation schematic diagram.
Specific implementation mode
A kind of electric line power factor controlling analysis method provided by the embodiments of the present application, solves or part solves
The electric energy of the electric energy metering device of enterprise metering numerical value and electric company of power factor during light load in the prior art
The power factor meter numerical quantity of metering device differs greatly, the technical problem for causing electric line transmission loss larger, realizes
The computation model of electric line is rationally established, the electric energy metering device of the enterprise power factor during light load is effectively reduced
Metering numerical value and electric company electric energy metering device power factor meter numerical quantity difference, and can improve examine put power because
Several technique effects.
The embodiment of the present application provides a kind of electric line power factor controlling analysis method, includes the following steps：
S1：Telemetry is acquired by electric power monitoring system and electricity is calculated by electric energy computing unit.Telemetry
Including：The end active-power P of the electric line2, end reactive power Q2And terminal voltage U2。
S2：Determine the computation model of electric line loss.
S3：Data processing is carried out to computation model by electric energy metering device, obtains the power factor of examination point；Electric energy meter
The time of amount device interval setting can carry out the primary data processing.
S4：The power factor of examination point is verified, checking procedure is：S401：When the power factor of examination point is more than
Or when equal to 0.9, verification is qualified.S402：When the power factor of examination point is less than 0.9, unqualified, optimal control transmission ＆ distribution are verified
Electric line makes the power factor of next examination point be greater than or equal to 0.9.
Further, electricity includes：Active electrical degree amount and idle electricity, active electrical degree amount and idle electricity according to
Electric degree statistical rules determines, the electricity of calculating is compared with the electricity that electric company calculates, can tentatively judge to look forward to
The power of the electric energy metering device of industry electric energy metering device of the metering numerical value and electric company of power factor during light load
Factor measures the different size of numerical difference.Inlet wire circuit is active (positive, reversed), idle in acquisition enterprise electric power monitoring system
The virtual values such as (positive, reversed), line voltage.The active and reactive data of acquisition calculate electricity by the way of area integral, product
It is determined according to the demand of metering system between timesharing, according still further to the assessing principle of electric company --- it is per minute to add up an electric degree
Amount.Referring to attached drawing 3, for the examination rule of power supply department power factor, the enterprise side month active summation moon is idle to feel the pulse with three fingers simulataneously according to following
Electric degree statistical rules is counted：1) examination region is I, IV quadrant：When survey it is active be more than zero when, enterprise from power grid by electricity,
Active count is added up；In such cases, idle normal cumulative, the idle anti-counting that takes absolute value is cumulative.2) it is not involved in examination area
Domain is II, III quadrant：It is active and idle all in accordance with zero processing when actual measurement is active is less than zero.In examination region, ignore circuit
In the case that end is active, first and last terminal voltage changes constraints, head end reactive power Q1With end reactive power Q2Relationship ginseng
See attached drawing 4.
Electric degree statistical rules includes：S101：When end active-power P2More than zero, and the idle direction in end is forward direction
When, telemetry is located at I quadrant of examination.S102：When end active-power P2Less than zero, and the idle direction in end is forward direction
When, telemetry is located at II quadrant of examination.S103：When end active-power P2Less than zero, and the idle direction in end is anti-
Xiang Shi, telemetry are located at III quadrant of examination.S104：When end active-power P2More than zero, and the idle direction in end is
When reversed, telemetry is located at IV quadrant of examination.
Further, when telemetry is located at I or IV quadrant of examination, active electrical degree amount is equal to end active-power P2
To the integral of interval time.Idle electricity is equal to end reactive power Q2Absolute value to the integral of interval time.Work as telemetering
When data are located at II or III quadrant of examination, electricity is equal to 0.
Further, the reactive power of electric line itself includes charge power, the production of overhead line susceptance that cable generates
The reactive loss of raw Capacitance Power, active generation, four part of reactive loss of idle generation are constituted, therefore even if transmission and distribution line
Road is unloaded, and the idle statistical value at both ends is also not quite similar.Referring to attached drawing 2, the computation model of electric line loss includes：
Electric line is overhead line and cable mixed power transmission line.The charge power that cable generates is QC.Transmission and distribution line
The admittance on road is B, reactance X, resistance R.
Charge power and the payload that electric line generates are only related to voltage without direct relation, to simplify the calculation,
It is assumed that voltages keep constant, then the charge power of electric line
The head end voltage of electric line is U1。
The head end active power of electric line is P1。
The head end reactive power of electric line is Q1。
Further, data handling procedure includes：
S301：Determine head end voltage U1,
S302：Determine head end active-power P1；When telemetry is located at I quadrant of examination, head end active powerWhen telemetry is located at IV quadrant of examination, head end active power
S303：Determine head end reactive power Q1；When telemetry is located at I quadrant of examination, head end reactive powerIt is first when telemetry is located at IV quadrant of examination
Hold reactive power
S304：The power factor for determining examination point, examines the power factor to be a little
Further, optimal control electric line, including：
S4021：Seek the end active-power P in the case of certain loadsIt is specialAnd end reactive power QIt is special；Wherein, specific
Under loading condition, the charge power Q of electric lineChargingFor fixed value；The charge power and Capacitance Power that electric line generates
It is offseted with reactive loss, electric line head end is identical with the reactive power of end, is all QIt is special。
S4022：According to end reactive power Q2With end reactive power QIt is specialComparing result, determine regulating measure；
Further, when 0 ends ＜ reactive power Q2The ends ＜ reactive power QIt is specialWhen, due to load reduction, the nothing of circuit
Work(loss reduces, then the reactive power that circuit generates is more than the reactive power of consumption, and reactive power distribution at this time should be line flows
To both ends.In the case of load underloading, it is located at I, II quadrant of electric degree statistical rules, it, only need to be in the number of I quadrant according to examination rule
According to being counted, ignore the reactive loss of active and reactive generation at this time, appropriateness reduces the idle benefit of electric line load side
Repay, make line charging power it is as few as possible flow to power end, with improve examination point power factor, be allowed to be greater than or equal to
0.9。
When end reactive power QIt is specialThe ends ＜ reactive power Q2When, improve the power factor of electric line load side；By
Increase in load, the reactive loss of circuit increases, and the reactive power of circuit consumption is more than the reactive power generated, at this time idle work(
Rate distribution should be power end and flow to load side, and Q2<Q1；Under load case of heavy load, it is located at I quadrant of electric degree statistical rules, should uses up
Amount improves the power factor of load side, to reduce line loss.The power factor of electric line load side is
When end reactive power QIt is specialWhen ＜ 0, reduce the reactive-load compensation of electric line load side, make the power of examination point because
Number is greater than or equal to 0.9.Load side is located at IV quadrant of electric degree statistical rules, at this time reactive overcompensation, should be greatly reduced idle
Compensation capacity, guarantee is idle not to be sent outside.
Further, regulating measure includes：
The electric system of enterprise is divided into 220kV systems, 110kV systems, 35kV systems and 10kV systems, avoiding four is
Idle between system passes through.110kV systems fully consider the influence of the charge power of power cable, pass through 300MW generating sets
Idle output is adjusted, the power factor of examination point is improved, reduces line loss, improve quality of voltage.
Electric system is centered on the transformer of 110kV systems, according to the difference of process, the voltage class spoke of 10kV systems
It is incident upon each region of enterprise；In each region, according to the power factor local compensation of examination point.
The region of 10kV systems is by switched capacitor, adjustment internal synchronization generator, motor reactive power and adjusts change
Depressor tap is controlled on the spot, reduces idle pass through.In 10kV systems and there is the case where generating set, once there is voltage
The power factor for improving generator outlet first is increased, suitably to reduce voltage, followed by 110/10kV on-load voltage regulation is utilized to become
Depressor suitably reduces 10kV system voltages, while the controlling unit for being installed additional in compensation device and preventing reactive power releasing can be considered,
The phenomenon that thus playing the role of idle in-situ balancing, while also preventing reactive power releasing.
Wherein, enterprise power distribution network is more with voltage class, more with electrical nodes, distribution network topology is complicated, the impact of load
Property, asymmetry and non-linear serious, the features such as power equipment power is big, continuous production, in consideration of it, optimizing regulation means are taken
Hierarchical control, subregion in-situ balancing principle, realize idle in-situ balancing, avoid long distance transmission reactive power and reduce nothing
Work(power passing through between different voltages grade reduces power attenuation to keep voltage within normal range (NR), and final realize is examined
The power factor of epipole is met the requirements.
Large size industrial enterprise power load is considerable, constitutes the microgrid to establish one's own system, another business electrical to a certain extent
Load fluctuation is larger, and outer supply line's load uncertainty of enterprise is caused to be not fixed.According to history run experience, since circuit is idle
Loss influences, especially in the case of circuit underloading, both ends (point of assets and business scope between electric company and power consumer
At boundary) power factor difference it is larger, therefore there is an urgent need for being calculated in real time to line loss, so that more accurate measure goes out power grid
The power factor of side examination point, and enterprises power factor is adjusted correspondingly according to above-mentioned limitation, make stoichiometric point
Power factor meets the requirement of appraisal standards.This method can be realized in electric power monitoring system, can accurately calculate power factor, close
It manages the reactive power of Optimal Control System, improve power quality and electricity supply and use equipment output, be particularly suitable for emergency generator
The industrial enterprise of unit or light load supply line.Large size industrial enterprise has the house generator of comprehensive utilization of resources type
Group, and most of emergency generator's unit single-machine capacities are small, generation load curve changes big.
One or more technical solutions provided herein, have at least the following technical effects or advantages：
The calculating of electric line loss is rationally established as a result of the telemetry acquired by electric power monitoring system
Model；By carrying out data processing to computation model, the power factor of examination point is obtained；To which more accurate measure goes out to examine a little
Power factor enterprises power factor is adjusted correspondingly by optimal control electric line, make next examine
The power factor of epipole is greater than or equal to 0.9, even if the power factor of examination point meets appraisal standards requirement.According to transmission line of electricity
Design feature, reasonable computation is carried out to the power factor of electric line and is corrected, and by taking hierarchical control, subregion just
The reactive balance regulating measure of ground balance improves the power factor of examination point, optimizes the system operation.In this way, efficiently solving existing
There is the electrical energy measurement of electric energy metering device the metering numerical value and electric company of power factor during light load of enterprise in technology
The power factor meter numerical quantity of device differs greatly, and the technical problem for causing electric line transmission loss larger realizes conjunction
Reason establishes the computation model of electric line, effectively reduces the meter of electric energy metering device power factor during light load of enterprise
The power factor meter numerical quantity difference of numerical quantity and the electric energy metering device of electric company, and examination point power factor can be improved,
Optimize the reactive power distribution of power supply-distribution system, the power factor of update the system improves power quality, and optimization hair, confession, electricity consumption are set
Received shipment row reduces the power attenuation of electrical equipment, improves the electricity consumption benefit of large enterprise.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not limited to this hair
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (2)
1. a kind of electric line power factor controlling analysis method, which is characterized in that the power factor controlling analysis method
Include the following steps：
Telemetry is acquired by electric power monitoring system and electricity is calculated by electric energy computing unit；The telemetry data packet
It includes：The end active-power P of the electric line2, end reactive power Q2And terminal voltage U2；The electricity includes：Have
Work(electricity and idle electricity；The active electrical degree amount and the idle electricity are determined according to electric degree statistical rules；It is described
Electric degree statistical rules includes：
When the end active-power P2More than zero, and when the idle direction in end is positive, the telemetry is located at examination
I quadrant；
When the end active-power P2Less than zero, and when the idle direction in the end is positive, the telemetry, which is located at, to be examined
II quadrant of core；
When the end active-power P2Less than zero, and when the idle direction in the end is reversed, the telemetry, which is located at, to be examined
III quadrant of core；
When the end active-power P2More than zero, and when the idle direction in the end is reversed, the telemetry, which is located at, to be examined
IV quadrant of core；When the telemetry is located at I or IV quadrant of examination, it is active that the active electrical degree amount is equal to the end
Power P2To the integral of interval time；The idle electricity is equal to the end reactive power Q2Absolute value to the interval
The integral of time；
When the telemetry is located at II or III quadrant of examination, the active electrical degree amount and the idle electricity are equal to
0；
Determine the computation model of the electric line loss；The computation model of electric line loss includes：
The electric line is overhead line and cable mixed power transmission line；
The charge power that the cable generates is QC；
The admittance of the electric line is B, reactance X, resistance R；
The charge power of the electric line
The head end voltage of the electric line is U1；
The head end active power of the electric line is P1；
The head end reactive power of the electric line is Q1；
Data processing is carried out to the computation model by electric energy metering device, obtains the power factor of examination point；The electric energy
The time of metering device interval setting can carry out the primary data processing；The data handling procedure includes：
Determine the head end voltage U1,
Determine the head end active-power P1；When the telemetry is located at I quadrant of examination, the head end active powerWhen the telemetry is located at IV quadrant of examination, the head end active power
Determine the head end reactive power Q1；When the telemetry is located at I quadrant of examination, the head end reactive powerWhen the telemetry is located at IV quadrant of examination
When, the head end reactive power
Determine that the power factor of the examination point, the power factor of the examination point are
The power factor of the examination point is verified, the checking procedure is：When the power factor of the examination point is more than
Or when equal to 0.9, verification is qualified；When the power factor of the examination point is less than 0.9, verification is unqualified, described in optimal control
Electric line makes the power factor of next examination point be greater than or equal to 0.9；Transmission and distribution line described in the optimal control
Road includes：
Seek the end active-power P in the case of certain loadsIt is specialAnd end reactive power QIt is special；
According to the end reactive power Q2With the end reactive power QIt is specialComparing result, determine regulating measure；
Wherein, in the certain loads, the charge power Q of the electric lineChargingFor fixed value；The power transmission and distribution
The charge power and Capacitance Power that circuit generates are offseted with reactive loss, the idle work(of the electric line head end and end
Rate is identical, is all QIt is special；
The end reactive power Q described in 0 ＜2End reactive power Q described in ＜It is specialWhen, reduce the nothing of the electric line load side
Work(compensates, and the power factor of the examination point is made to be greater than or equal to 0.9；
When the end reactive power QIt is specialEnd reactive power Q described in ＜2When, improve the power of the electric line load side
Factor；
When the end reactive power QIt is specialWhen ＜ 0, the reactive-load compensation of the electric line load side is reduced, makes the examination point
Power factor be greater than or equal to 0.9；
The power factor of the electric line load side is
2. power factor controlling analysis method as described in claim 1, which is characterized in that the regulating measure includes：
The electric system of enterprise is divided into 220kV systems, 110kV systems, 35kV systems and 10kV systems, avoids the 220kV
Idle between system, 110kV systems, 35kV systems and 10kV systems passes through；
The electric system is centered on the transformer of the 110kV systems, according to the difference of process, the electricity of the 10kV systems
Pressure grade is radiated to each region of the enterprise；In each region, on the spot according to the power factor of the examination point
Compensation；
The 110kV systems adjust idle output by 300MW generating sets, improve the power factor of the examination point；
The region of the 10kV systems is by switched capacitor, adjustment internal synchronization generator, motor reactive power and adjusts change
Depressor tap is controlled on the spot, reduces idle pass through.
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