CN110334854A - A kind of planning operation system of electric system - Google Patents
A kind of planning operation system of electric system Download PDFInfo
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- CN110334854A CN110334854A CN201910513800.6A CN201910513800A CN110334854A CN 110334854 A CN110334854 A CN 110334854A CN 201910513800 A CN201910513800 A CN 201910513800A CN 110334854 A CN110334854 A CN 110334854A
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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
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- H—ELECTRICITY
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- H—ELECTRICITY
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
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Abstract
The present invention relates to Power System Planning fields, and disclose a kind of planning operation system of electric system, the planning operation system of electric system the following steps are included: engineering region load forecast and Predicting Performance Characteristics, the load forecast is divided into ultra-short term, short-term, medium and long term load prediction；According to the load demand that a certain period is predicted, power source planning is carried out；Power balance is carried out according to load prediction and power source planning result；Power generating facilities and power grids planning.The planning operation system of the electric system, determine that the system peak load of a forcasted years combines the power output analysis of all kinds of power supplys to obtain quantity of electricity profit and loss by load prediction, so that it is determined that power generation needed for electric system, transformer equipment capacity, guarantee the in liberal supply of electricity, whole system operates normally, and meets needed for load growth as far as possible；And optimal power sources construction programme is selected, to obtain maximum economic benefit, electricity is fully used, and meets peak regulation requirement.
Description
Technical field
The present invention relates to Power System Planning field, the planning operation system of specially a kind of electric system.
Background technique
The extrusion energy of the electric energy as economic every field, rides very important effect in social development, with
Family is to amount of energy ever increasing need, and the demand in power quality, and the planning construction of electric system is also especially heavy
Want, to ensure that electrical equipment performance is best, efficiency highest, meet user demand, the high voltage of quality to the stabilization of power grids, economical transport
Row also plays a crucial role.
However, existing electric system is conventional power generation, transmission of electricity, power transformation, distribution and electricity consumption, since load is to become year by year
Change, and the planning of electric system is a long-term construction scheme, and existing electric system is caused to be easy to increase because of electricity in the later period
Power capacity caused by long and extraneous or equipment oneself factor is insufficient, influences the problem of system operates normally, and because of single power supply
Select permeability, so that the economic benefit is not high, electric power energy supply is unstable, cannot effectively meet peak regulation demand.
Summary of the invention
The present invention provides a kind of planning operation systems of electric system, have electric power energy and supply stable advantage, solution
The technical issues of being mentioned in background technique of having determined.
The invention provides the following technical scheme: a kind of planning operation system of electric system, the planning operation of electric system
System the following steps are included:
S1, engineering region load forecast and Predicting Performance Characteristics, the load forecast is divided into ultra-short term, short
Phase, medium and long term load prediction；
S2, the load demand predicted according to a certain period, carry out power source planning；
S3, power balance is carried out according to load prediction and power source planning result；
S4, power generating facilities and power grids planning.
Preferably, the load prediction basic program is as follows:
A, given load prediction plan；
B, survey data and selection data；
C, data to arrange；
D, to Preliminary Analysis For Data；
E, prediction model is established；
F, comprehensive analysis determines prediction result；
G, the management of load prediction.
Preferably, the power source planning includes planning the power generation capacity for needing to build in fraction of the year, building year by year in planning period
If power generation capacity, the infield of newly-built power generation capacity and wanting according to power load property in electric system and demand
It asks, proposes that the component type for building power supply year by year selects corresponding unit, and pay attention to the planning of peaking power source.
Preferably, the power supply architecture includes water power power supply, thermoelectricity power supply, nuclear power power supply and new energy power supply, and right
Power supply carries out corresponding layout.
Preferably, the power balance capacity is by installed capacity, necessary capacity, duplicate capacity and disabled capacity.
Preferably, the necessary capacity includes the sum of displacement volume and spare capacity, and the spare capacity includes that load is standby
With capacity, emergency reserve capacity and repair reserve of capacity.
Preferably, the Electric Power Network Planning include establish complete electric system, determine power transmission mode, selection network voltage,
It determines network structure, determine electric substation's layout and scale.
Preferably, electric system composition includes power generation, transmission of electricity, power transformation, distribution and electricity consumption, establishes power distribution network, from defeated
Power grid receives electric energy, the power network reallocated to different voltages grade, and is electrically calculated.
Preferably, the electrical calculation has Load flow calculation, stability Calculation, calculation of short-circuit current and reactive compensation meter
It calculates.
The present invention have it is following the utility model has the advantages that
1, the planning operation system of the electric system determines that the system peak load of a forcasted years combines by load prediction
The power output analysis of all kinds of power supplys obtains quantity of electricity profit and loss, so that it is determined that power generation needed for electric system, transformer equipment capacity, are protected
The in liberal supply of electricity is demonstrate,proved, whole system operates normally, meets needed for load growth as far as possible；By to multiple power sources selecting party
Case carries out Technological Economy comprehensive comparison, selects optimal power sources construction programme, to obtain maximum economic benefit, enables electric power
Source supply is stablized, and electricity is fully used, and meets peak regulation requirement.
2, the planning operation system of the electric system is mentioned by electrically calculating for system relay protection and stability Calculation
For foundation and initial value, directly possess the reliability for analyzing each system schema, various fault conditions of the stability Calculation to electric system
Carry out simulation calculating and analysis, so that it is determined that the main feature and level of power system stability problem, due to failed shorted
The abnormal current value generated on electrical component subtracts to select correct relay protection setting valve and quick fuse electric current
Few short circuit current duration, and then reduce loss caused by short circuit current.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of planning operation system of electric system, the planning operation system of electric system the following steps are included:
S1, engineering region load forecast and Predicting Performance Characteristics；
S2, the load demand predicted according to a certain period, carry out power source planning；
S3, power balance is carried out according to load prediction and power source planning result；
S4, power generating facilities and power grids planning；
Load forecast is divided into ultra-short term, short-term, medium and long term load prediction, and wherein ultra-short term is used for
Quality controls the load value for needing 5-10s, needs 1-5min load value for security monitoring, handles for prevention and control and the state of emergency
Need 10-60min load value；Short-term load forecasting is mainly used in thermoelectricity distribution, extreme misery point is coordinated, Unit Economic combination and exchange
Power planning needs 1 day to 1 week load value；Medium term load forecasting is mainly used for reservoir operation, unit maintenance, exchange plan
And fuel planning, need the load value in January to 1 year；Long term load forecasting is used for power supply and network Development, needs the several years to tens of
The load value in year；
Load prediction basic program:
A, given load prediction plan: the time including preparing prediction, required historical summary need how many moneys
Material, the method in the source and data collection of data, the time that prediction work is completed, funds in need；
B, survey data and selection data: various aspects adjust poor data collection, including electric power enterprise inside information and external money
Material, data requirement correlation, reliability, newest property, the collection and selection of data determine the quality of load prediction；
C, data to arrange integrates the data of mobile phone, examines the collected statistics with load oil pipe
Core and necessary processing and sorting make necessary to guaranteeing forecast quality, guarantee the quality of data to guarantee the quality of load prediction；
D, to Preliminary Analysis For Data: sorting out abnormal data, find out abnormal cause, be pocessed that (processing method includes outer
Pushing manipulation, regression analysis, time series method, wavelet analysis method and grey method etc.)
E, it establishes prediction model: by the foundation of the load forecasting model of statistics track, reflecting in empirical documentation
The general features of portion's structure, the specific structure chatted with the money not fully coincide, and wherein the materialization of model is exactly load prediction
Formula, formula can produce the numerical value for having structure of wanting to die in observed value, which is predicted value；Load forecasting model can be multiplicity
Property, to determine that prediction error size when necessary can be same load prediction suitable for the data of different structure selection prediction model
Defeated kind of mathematical model of Shi Caiyong carries out operation, to compare and to select；
F, comprehensive analysis determines prediction result: load prediction mathematical model appropriate is established, after obtaining predicted value, and ginseng
According to the various possibilities and new trend and development currently occurred, comprehensive analysis, comparison, reasoning are carried out, is finally repaired true
Prediction result, so as to adapt to from the past till now development and change rule, to influence prediction object new factor analyze,
It is subject to amendment appropriate, it is ensured that the accuracy of prediction result；
G, the management of load prediction: carrying out prediction error analysis to the result of prediction, finds out that wherein prediction error is biggish
Reason, finding out influences the Fundamentals reason of changes that historical load becomes, and replacement mathematical model is considered whether, to error ordered series of numbers point
Whether sufficiently suitably analysis helps to distinguish drafted model；Load prediction error analysis: the standard of prediction error and prediction result
True sexual intercourse is close, and error is lower, and accuracy is higher.
Power source planning: 1, the power generation capacity (including unit number of units, capacity motor ...) for needing to build in fraction of the year is planned；
2, the power generation capacity built year by year in planning period；
3, the infield of power generation capacity is created；
4, according to the requirement of power load property and demand in electric system, the component type for building power supply year by year is proposed
Corresponding unit is selected, and payes attention to the planning of peaking power source；
Select power supply architecture: water power: being generated electricity using discharge of river machine drop, and start and stop are convenient, and comprehensive benefit is high, can be adjusted
Peak load and the instantaneous stand-by for making system；Thermoelectricity: the steam-electric power generated using combustibles such as coal, petroleum, natural gases is suitable for single
People's peakload；Nuclear power: using controllable nuclear reactor as the power plant of power, dye transport amount is few, not ash discharge slagging machine flue dust,
Cost of investment is high, and the construction period is long, is suitable for single base load；New energy: wind energy, solar energy, geothermal energy, tide energy, biology
Energy is equal, unstable because excessively dispersing, expensive, can only provide a small amount of accessory power supply or in a short time with spare.
Power generation configuration:
Water power: construction has the large and medium-sized hydroelectric power plant of preferable regulation performance, and adaptation to local conditions develops small power station；
Thermoelectricity: pit-head power station, crossing power plant, port power plant, in load center construction parts backbone power plant；In fuel oil and day
Fuel oil and plant gas are built in the right abundant area of gas；
Nuclear power: in energy resources shortage, pressure on transport, Economic contrast developed regions, nuclear power plant is suitably built；
New energy: in power stations such as local construction wind energy, the solar energy for having corresponding natural conditions；It is a variety of can function selection electricity
Source construction scheme selects optimal power sources construction programme, by carrying out technology and economy comparison to each scheme to obtain maximum warp
Benefit of helping meets peak regulation requirement so that electric power energy supply stabilization, economic resultant force, electricity are fully used.
Power balance capacity composition:
Installed capacity: refer to the synthesis of the genset rated capacity of all kinds of Installation in Plant of system group；
It must capacity: referring to install necessary to maintaining electric system normal power supply total capacity, i.e. displacement volume and spare appearance
The sum of amount；
Displacement volume: refer to the capacity of the single electric system normal duty of generator；
Duplicate capacity: referring to hydroelectric power plant for multiple seasonal electric energy, saves thermoelectricity fuel and the power generation capacity added；
Disabled capacity: refer to that generating equipment cannot be by the capacity for hitting rated capacity power generation.
Determine that the system peak load of a forcasted years combines the power output analysis of all kinds of power supplys to obtain electric power by load prediction
Electricity profit and loss, so that it is determined that power generation needed for electric system, transformer equipment capacity, guarantee the in liberal supply of electricity, whole system
It operates normally, meets needed for load growth as far as possible.
Spare capacity:
Load is spare: when load constantly changes for adjust frequency and for meet hit with prediction the load equilibrium of supply and demand it
Between error and consider and (account for about 2%-5%)；Emergency duty: consider generator because remaining to maintain when accident is out of service to user
The spare capacity (accounting for about 10%) powered and needed；Overhaul reserve: in the power system for guarantee generating set can according to plan into
The spare capacity (accounting for about 8%-10%) of the maintenance of row period and consideration.
Electric Power Network Planning:
Complete electric system is established, power transmission mode is determined, selects network voltage, determine network structure, determine electric substation
Layout and scale.
Electric system composition: power generation, transmission of electricity, power transformation, distribution, electricity consumption establish power distribution network, receive electric energy from power transmission network, then
The power network of different voltages grade is distributed to, and is electrically calculated, electrical calculate includes Load flow calculation, and stability Calculation is short
Road electric current calculates and reactive compensation calculates, and Load flow calculation mainly calculates the distribution of power and voltage in electric power networks,
The method of operation for determining system, checks whether each element meets service requirement, provides for system relay protection and stability Calculation
The distribution situation of grid power trend can be obtained in foundation and initial value, directly possesses the reliability for analyzing each system schema；Stabilimeter
It calculates and simulation calculating and analysis is carried out to the various fault conditions of electric system, so that it is determined that the main spy of power system stability problem
It seeks peace level, can verify each system grid equipment system operational parameters meet the needs of stable operation, in necessary situation
Lower proposition stability strategy and safeguard；Calculation of short-circuit current mainly checks in given rack, due to failed shorted
The abnormal current value generated on electrical component subtracts to select correct relay protection setting valve and quick fuse electric current
Few short circuit current duration, and then reduce loss caused by short circuit current；Wherein power distribution network is divided into high voltage distribution network
(35kV-110kV), medium voltage distribution network (6kV-10kV) and low-voltage network (0.4kV)；Controller switching equipment includes: transformer, feeder line
(load is opened for (overhead line, cable), switch (breaker, sectionaliser, automatic circuit, on-load switch, high-tension fuse) and ring network cabinet
Pass, breaker or on-load switch+fuse combined electrical apparatus cabinet, are mainly used for 10kV and cable run distribution system below
Group is usually used in ring network power supply system)；The reactive compensation of power distribution network, the dispersion installation shunt capacitor in high and low voltage electric distribution route
Group installs shunt capacitor between distribution transformer low-pressure side and workshop switchboard and installs parallel connection near single motor
Capacitor (local compensation) etc., frequently with Reactive Compensation Mode have a local reactive power compensation, dispersion reactive compensation and concentrate idle
Compensation.
Local reactive power compensation: being directly installed near electrical equipment using capacitor, is in parallel with the current supply circuit of motor,
It is usually used in low voltage electric network, it uses thyristor or mechanical switch as fling-cut switch, and voltage sensor on the spot controls
Automatically switched capacitor, idle needed for motor when operation to be supplied on the spot by capacitor, energy exchange distance is most short, can be maximum
Limit reduces the electric current of route, and reactive compensation appropriate can provide corresponding reactive power to the inductive load in electric power networks,
To reduce various network elements because transmission inactivity caused by electric energy loss, it is low to blocking when necessary according to reactive balance
Voltage fluctuation is checked when piezoelectric capsule switching.
Dispersion reactive compensation: it is grouped on the bridge for the distribution line for being mounted on medium voltage distribution network using high-voltage capacitor, is public
With the low-pressure side of distribution transformer, each workshop of user distribution bus on, reach improve power grid power factor, reduce supply lines
The electric current on road reduces the purpose of line loss.
Concentrate reactive compensation: using the high-voltage capacitor in substation and high voltage supply power consumer step-down substation bus
Group further includes the capacitor group concentrated on the total distribution height bus of power consumer, its advantage is that being conducive to control voltage water
It is flat, and it is easily achieved automatic switching, utilization rate height, it is easy to maintain, it can be reduced power distribution network, user transformers and the nothing for specializing in route
Workload and electric energy loss, but not can be reduced load or burden without work and electric energy loss inside power consumer on each distribution line.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of planning operation system of electric system, the planning operation system of electric system the following steps are included:
S1, engineering region load forecast and Predicting Performance Characteristics, the load forecast be divided into ultra-short term, it is short-term,
Medium and long term load prediction；
S2, the load demand predicted according to a certain period, carry out power source planning；
S3, power balance is carried out according to load prediction and power source planning result；
S4, power generating facilities and power grids planning.
2. a kind of planning operation system of electric system according to claim 1, it is characterised in that: the load prediction base
This program is as follows:
A, given load prediction plan；
B, survey data and selection data；
C, data to arrange；
D, to Preliminary Analysis For Data；
E, prediction model is established；
F, comprehensive analysis determines prediction result；
G, the management of load prediction.
3. a kind of planning operation system of electric system according to claim 1, it is characterised in that: the power source planning packet
The peace of the power generation capacity, newly-built power generation capacity that include and plan the power generation capacity for needing to build in fraction of the year, built year by year in planning period
Place and the requirement according to power load property and demand in electric system are filled, proposes the component type for building power supply year by year
Corresponding unit is selected, and payes attention to the planning of peaking power source.
4. a kind of planning operation system of electric system according to claim 1, it is characterised in that: the power supply architecture packet
Water power power supply, thermoelectricity power supply, nuclear power power supply and new energy power supply are included, and corresponding layout is carried out to power supply.
5. a kind of planning operation system of electric system according to claim 1, it is characterised in that: the power balance holds
Amount is by installed capacity, necessary capacity, duplicate capacity and disabled capacity.
6. a kind of planning operation system of electric system according to claim 1, it is characterised in that: the necessary capacity packet
The sum of displacement volume and spare capacity are included, the spare capacity includes reserve capacity for load variation in power, emergency reserve capacity and overhaul reserve
Capacity.
7. a kind of planning operation system of electric system according to claim 1, it is characterised in that: the Electric Power Network Planning packet
Include and establish complete electric system, determine power transmission mode, select network voltage, determine network structure, determine electric substation layout and
Scale.
8. a kind of planning operation system of electric system according to claim 7, it is characterised in that: the electric system group
At including power generation, transmission of electricity, power transformation, distribution and electricity consumption, power distribution network is established, electric energy is received from power transmission network, reallocates to different voltages
The power network of grade, and electrically calculated.
9. a kind of planning operation system of electric system according to claim 8, it is characterised in that: the electrical calculating side
Formula has Load flow calculation, stability Calculation, and calculation of short-circuit current and reactive compensation calculate.
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| CN201910513800.6A CN110334854A (en) | 2019-06-14 | 2019-06-14 | A kind of planning operation system of electric system |
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| CN201910513800.6A CN110334854A (en) | 2019-06-14 | 2019-06-14 | A kind of planning operation system of electric system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112381304A (en) * | 2020-11-19 | 2021-02-19 | 陈志� | Planning operation system of electric power system |
| CN113541200A (en) * | 2021-07-14 | 2021-10-22 | 广东电网有限责任公司 | Power grid system operation control method and system |
| CN114156873A (en) * | 2021-11-24 | 2022-03-08 | 国网吉林省电力有限公司 | Method for calculating reserve capacity of power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103577901A (en) * | 2013-11-22 | 2014-02-12 | 国家电网公司 | Method of intertidal zone wind power for accessing power grid |
| CN104504183A (en) * | 2014-12-10 | 2015-04-08 | 广州供电局有限公司 | Power distribution network intelligent planning system based on automatic optimization |
| US20190108463A1 (en) * | 2017-04-24 | 2019-04-11 | State Grid Corporation Of China | Method for constructing a future-state power grid model, device and equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103577901A (en) * | 2013-11-22 | 2014-02-12 | 国家电网公司 | Method of intertidal zone wind power for accessing power grid |
| CN104504183A (en) * | 2014-12-10 | 2015-04-08 | 广州供电局有限公司 | Power distribution network intelligent planning system based on automatic optimization |
| US20190108463A1 (en) * | 2017-04-24 | 2019-04-11 | State Grid Corporation Of China | Method for constructing a future-state power grid model, device and equipment and storage medium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112381304A (en) * | 2020-11-19 | 2021-02-19 | 陈志� | Planning operation system of electric power system |
| CN113541200A (en) * | 2021-07-14 | 2021-10-22 | 广东电网有限责任公司 | Power grid system operation control method and system |
| CN114156873A (en) * | 2021-11-24 | 2022-03-08 | 国网吉林省电力有限公司 | Method for calculating reserve capacity of power system |
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