CN107026458A - A kind of idle switching optimization Simulation system and method for transformer station - Google Patents
A kind of idle switching optimization Simulation system and method for transformer station Download PDFInfo
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- CN107026458A CN107026458A CN201710202314.3A CN201710202314A CN107026458A CN 107026458 A CN107026458 A CN 107026458A CN 201710202314 A CN201710202314 A CN 201710202314A CN 107026458 A CN107026458 A CN 107026458A
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- transformer station
- reactive
- idle
- switching
- optimization
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- 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 invention discloses a kind of idle switching optimization Simulation system of transformer station, comprising：Data acquisition module, for combining to form the method for operation before switching according to Equipment Foundations parameter in transformer station and trend mode, and obtains running mode data before switching；Computing module, is connected with described data acquisition module, for according to running mode data before switching, obtaining the result of calculation of idle quantity of state；Optimization module, is connected with described computing module, for carrying out switching optimization according to the result of calculation of idle quantity of state, determines the reactive compensation capacity in transformer station；Performing module, is connected with described optimization module, for according to the reactive compensation capacity in transformer station, being checked to the reactive power exchange amount under set reactive-load compensation state during medium voltage side voltage change.The invention also discloses a kind of idle switching simulation-optimization method of transformer station.Reactive power exchange power of the present invention is small, and control effect is good.
Description
Technical field
The present invention relates to electric analog technical field, and in particular to a kind of idle switching optimization Simulation system of transformer station and
Its method.
Background technology
Power System Reactive Power should meet the basic demand of " layering and zoning, in-situ balancing ".Come from the requirement of " layering "
See, answer basic compensated line charge power (deduction in AC network Zhong Ge transformer stations in the switching of reactive-load compensation equipment, total amount
Lines in parallel reactor capacity) deduct the vacancy after circuit, transformer reactive loss；From the point of view of the requirement of " subregion ", preferable feelings
Reactive power flow is 0 between the switching of reactive-load compensation equipment should ensure that station in Kuang Xia transformer stations, i.e., in the absence of reactive power flow at station and station
Between flow.And power system operating mode is ever-changing, under different active transportation horizontals, the idle damage on circuit and transformer
Consumption differs greatly, while busbar voltage influences reactive loss in turn there is also fluctuation again.Voltage and it is idle be the presence of phase
The mutual interdependent complex relationship mutually restricted.Therefore, the requirement of idle " layering and zoning, in-situ balancing " is fully met, exchange becomes
The switching of reactive apparatus in power station, needs the change of tracking range finding to carry out real-time switching.
The content of the invention
It is an object of the invention to provide a kind of idle switching optimization Simulation system and method for transformer station, reactive power exchange
Power is small, and control effect is good.
In order to achieve the above object, the present invention is achieved through the following technical solutions：A kind of idle switching optimization of transformer station is imitative
True system, is characterized in, comprising：
Data acquisition module, is transported for being combined to be formed before switching according to Equipment Foundations parameter in transformer station and trend mode
Line mode, and obtain running mode data before switching；
Computing module, is connected with described data acquisition module, for according to running mode data before switching, obtaining nothing
The result of calculation of work(quantity of state；
Optimization module, is connected with described computing module, excellent for carrying out switching according to the result of calculation of idle quantity of state
Change, determine the reactive compensation capacity in transformer station；
Performing module, is connected with described optimization module, for according to the reactive compensation capacity in transformer station, to set
Reactive power exchange amount under reactive-load compensation state during medium voltage side voltage change is checked.
Described data acquisition module includes Data Synthesis unit and the basal profile data acquisition list being attached thereto respectively
Member and infrastructure device data capture unit, described Data Synthesis unit are connected with described computing module, wherein, it is described
Basal profile data capture unit is used for according to the combination of each outlet active power, main transformer tap joint position and equivalent generator machine
Terminal voltage obtains basal profile data；Described infrastructure device data capture unit is used for according to main transformer, outlet reactance and power transformation
Reactive-load compensation equipment capacity, group number obtain infrastructure device data in standing；Described Data Synthesis unit is used for according to basal profile
Data and infrastructure device data obtain running mode data before switching.
A kind of idle switching simulation-optimization method of transformer station, is characterized in, comprises the steps of：
Step S1：Combine to form the method for operation before switching according to Equipment Foundations parameter in transformer station and trend mode, and obtain
Take running mode data before switching；
Step S2：According to running mode data before switching, the result of calculation of idle quantity of state is obtained；
Step S3：Switching optimization is carried out according to the result of calculation of idle quantity of state, determines that the reactive-load compensation in transformer station is held
Amount；
Step S4：According to the reactive compensation capacity in transformer station, to medium voltage side voltage change under set reactive-load compensation state
When reactive power exchange amount checked.
Included in described step S1：
Step S1.1：Obtained according to the combination of each outlet active power, main transformer tap joint position and equivalent generator terminal voltage
Take basal profile data；
Step S1.2：Obtain basis according to reactive-load compensation equipment capacity, group number in main transformer, outlet reactance and transformer station and set
Standby data；
Step S1.3：Running mode data before switching is obtained according to basal profile data and infrastructure device data.
A kind of idle switching optimization Simulation system and method for transformer station of the present invention have following excellent compared with prior art
Point：The idle switching optimisation strategy of transformer station is drawn by emulation, reactive power exchange power can be controlled, control effect is good.
Brief description of the drawings
Fig. 1 is a kind of structured flowchart of the idle switching optimization Simulation system of transformer station of the invention；
Fig. 2 is a kind of flow chart of the idle switching simulation-optimization method of transformer station of the invention；
Fig. 3 is compensation capacity reactive balance principle schematic diagram in extra-high-voltage alternating current transformer station；
Fig. 4 A are extra-high-voltage alternating current transformer station trend combination diagram one；
Fig. 4 B are extra-high-voltage alternating current transformer station trend combination diagram two；
Fig. 5 is AC Substation equivalent constructions schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
Modern power system simulation software starts to provide second development interface to researcher, it is allowed to which researcher opens
Shell script is sent out, to expand model, to be automatically performed large batch of simulation calculation and interpretation of result.PSS/E is this alanysis work
The representative of tool.From PSS/E30 versions, start to support Python development languages.Python development languages are that one kind flowed in recent years
Cross-platform, object-oriented, general, the open programming language that row gets up.It is used as script, Python exploitation languages
One of design object of speech is exactly to turn into a kind of " glue " language.When developing senior application based on PSS/E, Python exploitations
Language can directly invoke the abundant api function provided inside PSS/E, so that control PSS/E completely is various short to realize
Road, Load flow calculation function.
The present invention is based on Python programming languages, calls PSS/E as core calculations engine, develops transformer station
Idle switching optimization Simulation system, as shown in figure 1, comprising：Data acquisition module 100, for according to Equipment Foundations in transformer station
Parameter and trend mode combine to form the method for operation before switching, and obtain running mode data before switching；Computing module 200, with
Described data acquisition module connection, for according to running mode data before switching, obtaining the result of calculation of idle quantity of state；
Optimization module 300, is connected with described computing module, for carrying out switching optimization according to the result of calculation of idle quantity of state, really
Determine the reactive compensation capacity in transformer station；Performing module 400, is connected with described optimization module, for according in transformer station
Reactive compensation capacity, the reactive power exchange amount under set reactive-load compensation state during medium voltage side voltage change is checked.
In the present embodiment, it is preferred that described data acquisition module 100 comprising Data Synthesis unit 101 and respectively with
Connection basal profile data capture unit 102 and infrastructure device data capture unit 103, described Data Synthesis unit
101 are connected with described computing module 200, wherein, described basal profile data capture unit 102 is used for according to each outlet
Active power combination, main transformer tap joint position and equivalent generator terminal voltage obtain basal profile data；Described basis is set
Standby data capture unit 103 is used to obtain base according to reactive-load compensation equipment capacity, group number in main transformer, outlet reactance and transformer station
Plinth device data；Described Data Synthesis unit 101 is used to be obtained before switching according to basal profile data and infrastructure device data
Running mode data.
With reference to the above-mentioned idle switching optimization Simulation system of transformer station, the invention also discloses a kind of idle throwing of transformer station
Simulation-optimization method is cut, as shown in Fig. 2 comprising the steps of：
Step S1：Combine to form the method for operation before switching according to Equipment Foundations parameter in transformer station and trend mode, and obtain
Take running mode data before switching.
Step S1.1：Obtained according to the combination of each outlet active power, main transformer tap joint position and equivalent generator terminal voltage
Take basal profile data；
Step S1.2：Obtain basis according to reactive-load compensation equipment capacity, group number in main transformer, outlet reactance and transformer station and set
Standby data；
Step S1.3：Running mode data before switching is obtained according to basal profile data and infrastructure device data.
Step S2：According to running mode data before switching, the result of calculation of idle quantity of state is obtained.
Step S3：Switching optimization is carried out according to the result of calculation of idle quantity of state, determines that the reactive-load compensation in transformer station is held
Amount.
Step S4：According to the reactive compensation capacity in transformer station, to medium voltage side voltage change under set reactive-load compensation state
When reactive power exchange amount checked.
In the present embodiment, for determining each Reactive Power Compensation Eqyuipment in Substation Switching rule of extra-high voltage (1000kV).It is extra-high
The capacity of pressure input low-pressure reactive compensation and extra-high voltage conveying power level are closely related.Therefore, extra-high voltage system is primarily determined that
Reactive power compensator switching Controlling principle is：As extra-high voltage conveys the change of power, switching reactive-load compensation equipment makes extra-high voltage
System and the reactive power exchange power of 500kV power networks are minimum.According to this principle, calculate below extra-high voltage the control of reactive power compensating and
Situation is exchanged with System Reactive Power.
The reactive power flow at circuit midpoint is idle switching amount in 0, i.e. transformer station between hypothesis ultra-high voltage transformer station in the present invention
Principle is carried out as shown in Figure 3.
In Fig. 3, it is transformer station's reactive balance region in dotted line frame, meets formula following formula：
Each variable implication is as follows in formula (1)：
Qci：The low-pressure reactive compensation capacity of i transformers in transformer station, capacitive is just, perception is negative；
t：Transformer number of units in transformer station；
Qsys：Transformer station from lower system absorb it is idle；
Charge power of transformer station's i outlets by circuit midpoint；
n：Transformer station's transmission line circuit number；
ΔQTi：I change electrical equipment reactive loss；
Reactive loss of transformer station's i outlets by circuit midpoint；
Qshunti：I outlets shunt reactor capacity in transformer station
subi：Adjacent i substation bus bars
By formula (1) principle, reactive compensation capacity should be in transformer station：
To reach the requirement of " layering " balance, Q is madesysFor 0, then reactive compensation capacity is：
That is, reactive-load compensation amount in station, equal to transformer reactive loss, half outlet reactive loss, Divergent line
High-voltage shunt reactor capacity three sum deducts the no-power vacancy after half outlet charge power.
Transformer reactive loss Δ QTi, circuit reactive lossIt is relevant with trend and voltage level, calculate respectively such as
Formula (4) and formula (5)：
Each variable implication is as follows in formula (4) and formula (5)：
PTi：I transformer active trends；
QTi：I transformer reactive power flows；
VTi：I transformer bus line voltage (power flow monitor point side)
Pli：I outlet effective power flows；
Qli：I outlet reactive power flows；
Vli：I outlets line voltage (power flow monitor point side)
XTi：I transformer reactances
Xli：I outlet reactance
Under normal condition, system voltage is run near perunit value 1, and power factor is more than 0.9.Use perunit value
Expression is as follows：
By formula (6) and formula (7)) formula (3) is substituted into, obtain：
Order：
VarstateThe idle quantity of state for being transformer station under corresponding mode.Then reactive-load compensation amount is in transformer station：
Idle quantity of state VarstatePhysical meaning be transformer station's reactive loss (main transformer+half outlet) same to Divergent line
Shunt reactor capacity sum subtracts the difference of outlet half charge power.Reactive compensation capacity needed in namely standing is equal to
Idle quantity of state.
From analysis above, it is ensured that accomplish idle local balance as far as possible in transformer station's reactive balance region,
Reactive-load compensation equipment need to be according to idle quantity of state Var in standingstateCarry out switching.And idle quantity of state VarstateBy effective power flow
Change influence is larger.And for the transformer station of outgoing lines, each branch-off element (including outlet, main transformer) trend size, direction can
Influence each other.To be illustrated exemplified by certain transformer station's (returning back out line, two main transformers containing two).
In Fig. 4 A, two, which return back out line, belongs to same direction, and direction of tide is consistent, it is clear that transformer trend returns back out line tide for two
Flow sum.Now Line Flow is bigger, it is believed that idle quantity of state VarstateBigger, compensation rate is more in required station.
And in Fig. 4 B, two return back out line from different directions, direction of tide is on the contrary, transformer station is supplied for local load except undertaking
Outside electric task, it still assume responsibility for a part and pass through trend, transformer trend is two differences for returning back out line trend.Now two loop line roads are damp
If stream increases simultaneously, transformer trend not necessarily increases, in some instances it may even be possible to reduce, idle quantity of state VarstateVariation tendency needs tool
Body is analyzed.
If transformer station's outlet three times, four times it is even more many, different trends combinations are increasingly complex.
No matter how direction of tide changes, the idle quantity of state Var of transformer station's no-power vacancy is characterizedstateWith required idle
The relation of compensation rate is constant.Therefore, can be to idle quantity of state Var in transformer station under various power combinationsstateSupervised
Depending in this, as the foundation of idle switching in station.
Can be structure as shown in Figure 5 by transformer station's equivalence when idle switching optimization is carried out to single transformer station：To power transformation
Main transformer in standing, reactive-load compensation equipment, bus and outer outlet (bus to outlet midpoint) of standing are retained, beyond main transformer medium voltage side
System represents that circuit effective power flow represents that load or burden without work is set to 0 with the duty value of line end with equivalent generator.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description be not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited by appended claim
It is fixed.
Claims (4)
1. a kind of idle switching optimization Simulation system of transformer station, it is characterised in that include：
Data acquisition module, for combining according to Equipment Foundations parameter in transformer station and trend mode and to form operation side before switching
Formula, and obtain running mode data before switching；
Computing module, is connected with described data acquisition module, for according to running mode data before switching, obtaining idle state
The result of calculation of amount；
Optimization module, is connected with described computing module, for carrying out switching optimization according to the result of calculation of idle quantity of state, really
Determine the reactive compensation capacity in transformer station；
Performing module, is connected with described optimization module, for according to the reactive compensation capacity in transformer station, to set idle benefit
Reactive power exchange amount when repaying medium voltage side voltage change under state is checked.
2. the idle switching optimization Simulation system of transformer station as claimed in claim 1, it is characterised in that described data acquisition mould
Block includes Data Synthesis unit and the basal profile data capture unit and infrastructure device data capture unit that are attached thereto respectively,
Described Data Synthesis unit is connected with described computing module, wherein, described basal profile data capture unit is used for root
Basal profile data are obtained according to the combination of each outlet active power, main transformer tap joint position and equivalent generator terminal voltage；It is described
Infrastructure device data capture unit be used to be obtained according to reactive-load compensation equipment capacity in main transformer, outlet reactance and transformer station, group number
Take infrastructure device data；Described Data Synthesis unit is used to be obtained before switching according to basal profile data and infrastructure device data
Running mode data.
3. a kind of idle switching simulation-optimization method of transformer station, it is characterised in that comprise the steps of：
Step S1：Combined to form the method for operation before switching according to Equipment Foundations parameter in transformer station and trend mode, and obtain throwing
Cut preceding running mode data；
Step S2：According to running mode data before switching, the result of calculation of idle quantity of state is obtained；
Step S3：Switching optimization is carried out according to the result of calculation of idle quantity of state, the reactive compensation capacity in transformer station is determined；
Step S4：According to the reactive compensation capacity in transformer station, under set reactive-load compensation state during medium voltage side voltage change
Reactive power exchange amount is checked.
4. the idle switching simulation-optimization method of transformer station as claimed in claim 3, it is characterised in that wrapped in described step S1
Contain：
Step S1.1：Base is obtained according to the combination of each outlet active power, main transformer tap joint position and equivalent generator terminal voltage
Plinth mode data；
Step S1.2：Infrastructure device number is obtained according to reactive-load compensation equipment capacity, group number in main transformer, outlet reactance and transformer station
According to；
Step S1.3：Running mode data before switching is obtained according to basal profile data and infrastructure device data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103947A (en) * | 2018-08-24 | 2018-12-28 | 国家电网公司西北分部 | A method of plant stand no-power vacancy is determined using reactive balance |
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| CN103248059A (en) * | 2013-05-07 | 2013-08-14 | 广东电网公司电力科学研究院 | Reactive voltage optimization method and system for distribution network |
| CN106549394A (en) * | 2016-12-07 | 2017-03-29 | 东北大学 | Electric power idle work optimization system and method based on double fish-swarm algorithms |
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2017
- 2017-03-30 CN CN201710202314.3A patent/CN107026458A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101764411A (en) * | 2009-12-30 | 2010-06-30 | 北京九瑞福软件技术开发有限责任公司 | Reactive power compensation optimizing configuration calculator for transformer substation and optimizing configuration method thereof |
| CN103248059A (en) * | 2013-05-07 | 2013-08-14 | 广东电网公司电力科学研究院 | Reactive voltage optimization method and system for distribution network |
| CN106549394A (en) * | 2016-12-07 | 2017-03-29 | 东北大学 | Electric power idle work optimization system and method based on double fish-swarm algorithms |
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| CN109103947A (en) * | 2018-08-24 | 2018-12-28 | 国家电网公司西北分部 | A method of plant stand no-power vacancy is determined using reactive balance |
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