CN103023022A - Simulating calculation method for transmission section power limit based on real-time monitoring data of line - Google Patents
Simulating calculation method for transmission section power limit based on real-time monitoring data of line Download PDFInfo
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- CN103023022A CN103023022A CN2012104925106A CN201210492510A CN103023022A CN 103023022 A CN103023022 A CN 103023022A CN 2012104925106 A CN2012104925106 A CN 2012104925106A CN 201210492510 A CN201210492510 A CN 201210492510A CN 103023022 A CN103023022 A CN 103023022A
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Abstract
The invention discloses a simulating calculation method for a transmission section power limit based on real-time monitoring data of a line. The simulating calculation method comprises the following steps of: arranging microclimate, lead, hardware fitting temperature measurement and the other on-line monitoring equipment on a key line of a power grid according to stability computation results of the power grid, collecting operating data of the line in real time, and transmitting the operation data to a power grid monitoring center; comparing an environmental condition with the completed stability computation results of the power grid by determining the environmental condition of the electric transmission line in real time, and checking and evaluating the correctness of the stability computation results; reasonably arranging the operation mode of the current power grid by referencing the real-time operation data of the electric transmission line, and guiding the stability check calculation of a next year. The simulating calculation method is suitable for calculating the transmission section power limit in the stability analysis of the electric system.
Description
Technical field
The present invention relates to a kind of section power limit emulated computation method of taking into account the circuit Real-time Monitoring Data, belong to the power system stability analysis technical field.
Background technology
In electric power system, evaluation work is checked in the annual stabilization of power grids that all needs to carry out following 2-3.Before carrying out the stability Calculation task, at first to carry out the establishment of boundary condition.The boundary condition of stability Calculation comprises that network load prediction level, the annual rack in following two to three years change project (situation of change that comprises power supply and electrical network) etc.After boundary condition is determined, can carry out the preparation of simulation calculation data, mainly be to carry out the emulated data modeling according to boundary condition and analogue system calculation requirement, calculation content is mainly used in searching and find the hidden danger that may exist in the electrical network, these hidden danger comprise, the transmitted power that the little wire diameter wire in the electrical network bears surpasses its long-term operate power, area power grid voltage levvl of allowing and do not meet the demands etc.According to calculating conclusion, the suggestion that proposes to solve following electrical network problem.The flow chart of whole stabilization of power grids analysis simulation calculation as shown in Figure 1.
Have following problem in present stabilization of power grids calculating is checked: (1) ambient temperature and conductor overheating amount adopt fixed numbers, such as, the ambient temperature in the harshest situation is by 40 degrees centigrade of considerations of the hottest month outdoor maximum temperature; (2) the wire maximum safety temperature adopts fixed numbers, and overhead line conductor heating maximum permissible value is generally by 70 degrees centigrade of calculating.Such check result of calculation can't reflect ambient temperature and the conductor overheating situation of transmission line under practical operation situation, so that result's confidence level is affected.
Current, the pressure of resources and environment aspect constantly increases in the global range, and society improves day by day to the requirement of environmental protection, energy-saving and emission-reduction and sustainable development; Simultaneously, the continuous propelling of electricity market process and user be to the continuous lifting of the quality of power supply and reliability requirement, and this requires following electrical network that the supply of electric power of safer, reliable, cleaning, high-quality must be able to be provided.For this reason, the requirement of power grid construction should be satisfied electric network reliability and fail safe needs on the one hand, should as far as possible rationally reduce power network construction project again on the other hand, alleviates passway for transmitting electricity and builds nervous pressure, to save soil and all kinds of resource.Thereby the actual conditions carrying out how considering when the power grid security check analysis is calculated electrical network become a problem demanding prompt solution.
Summary of the invention
The objective of the invention is, take into account the circuit practical operation situation for being implemented in when power system stability is checked calculating, propose a kind of transmission section power limit Simulation Analysis method.
Technical scheme of the present invention is that the inventive method has been taken into account the Real-time Monitoring Data of transmission line in the electrical network; By microclimate, wire and the gold utensil temperature survey on-line monitoring equipment that the key transmission circuit in electrical network is installed, Real-time Collection circuit service data, the unified power system monitor center that is sent to; The transmission line Real-time Monitoring Data that application collects improves the accuracy that result of calculation is checked in the stabilization of power grids.
The step that the present invention takes into account the transmission section power limit emulated computation method of circuit Real-Time Monitoring is:
1, the stabilization of power grids is checked and is calculated.
Primary Calculation is carried out in the stabilization of power grids, find out critical circuits and the generating set that may affect power grid security.
2, circuit operation Real time data acquisition.
Critical circuits in electrical network is installed microclimate, wire and gold utensil temperature survey on-line monitoring equipment, Real-time Collection circuit service data, the unified power system monitor center that is sent to.
3, consider transmission line real-time running data, rational power system operating mode.
Behind the real-time running data of dispatching of power netwoks operation department critical circuits in obtaining electrical network, the residing environmental aspect of clear and definite transmission line is compared with completed stabilization of power grids result of calculation, checking computations and assessment stability Calculation result's correctness; With reference to the transmission line real-time running data, the current power system operating mode of reasonable arrangement and guides the next year stabilization of power grids to check and calculates.In the stability Calculation of next year, with reference to the adverse circumstances of wire in the current year and enthusiasm condition the most occurred frequently, in stability Calculation work from now on, adopt practicable transmission of electricity limit data.
The present invention's beneficial effect compared with the prior art is that (1) the inventive method has been considered the actual conditions of operation of power networks, so that check result of calculation is more accurate; (2) the present invention can excavate the passway for transmitting electricity potentiality as far as possible in the situation that guarantees safety, saves the power grid construction investment, promotes energy-saving and emission-reduction.
Transmission section power limit simulation calculation when the inventive method is applicable to carry out stability analysis in electric power system.
Description of drawings
Fig. 1 is the flow chart that existing stability simulation calculates;
The flow chart that Fig. 2 calculates for the stability simulation of considering the circuit Real-Time Monitoring.
Embodiment
The embodiment that the present invention takes into account the transmission section power limit emulated computation method of circuit Real-Time Monitoring may further comprise the steps:
1, the stabilization of power grids is checked and is calculated
The stabilization of power grids is checked the flow process of calculating and be may further comprise the steps:
(1) boundary condition is formulated.The basis of compilation of boundary condition is the major network Rolling Planning of electrical network, the electric grid investment plan of development planning department and the construction project plan of bouw/infra etc., is used for determining network load prediction level, annual power supply and power network construction project etc.
(2) grid simulation data modeling.According to the requirement of analogue system calculated data modeling, second and third annual power network construction project data in the fixed boundary condition are input in the analogue system model of annual electrical network situation after foundation can reflect.Emulated data modeling content comprises definite transmission line length, model, single two data of returning, the parameters such as the resistance by calculate obtaining circuit, reactance, adopt similar mode to calculate main transformer parameter, generator parameter, capacity reactance device parameter, according to each element connected mode, finally erect electrical network Calculation Simulation system model again.
(3) electricity net safety stable calculates.According to the requirement of " guiding rules of power system safety and stability ", based on the electric network model of having put up, carry out the Simulation Analysis such as trend, transient stability, little interference under first, second level security stability criterion, find the safety and stability hidden danger that exists in the electrical network.Whether alternative route transmission power and the line power limit are searched the out-of-limit little wire diameter wire of operate power in the electrical network, check simultaneously the area power grid voltage levvl and meet the demands, and find out voltage stabilization weakness zone in the system.
2, at the critical circuits of passway for transmitting electricity online monitoring equipment is installed, is gathered real-time running data.
By being installed in microclimate, wire and the gold utensil on-line temperature monitoring equipment on the transmission line, can obtain the detailed first-hand meteorologic parameter data such as temperature, humidity, wind direction, wind speed, rainfall, atmospheric pressure on the monitored overhead line structures; By at wire and gold utensil sensor for measuring temperature being installed, pass field wires and node intensification situation back rear Surveillance center in real time, then in conjunction with parameters such as the temperature of site environment, humidity, wind speed, wind direction, sunshines, the reference line conveying capacity, realization is analyzed wire overtemperature, sag trend were, effectively solves the electric power accident that conductor temperature raises, sag reduces and cause.
3, according to real-time running data, formulate current power system operating mode and and guide stability Calculation work in the coming year.
After obtaining the transmission line real-time measuring data, carry out following work:
(1) the stability Calculation result adjusts.After obtaining the transmission line real-time running data, can determine in real time the residing environmental aspect of transmission line and circuit heating situation, thereby determine the actual fed power limit of transmission line.The transmission line stability limit data of considering are calculated in this limit and the stabilization of power grids compared, can check and assess stability Calculation result's accuracy.
(2) reasonable arrangement power system operating mode.Check result of calculation according to the stabilization of power grids, and with reference to the transmission line real-time running data, can calculate the real-time transmission power limit of each transmission line section, calmodulin binding domain CaM network load level, but the service work of the grid equipments such as reasonable arrangement circuit, generator, such as, when the transmission cross-section power margin is larger, can be suitably arrange overhauls of the equipments more, at power margin hour, then should reduce or do not arrange grid maintenance work.Can reach like this and adjust current power system operating mode, adapt to the demand of operation of power networks real-time change.
(3) instructing the next year stabilization of power grids to check calculates.In the stability Calculation of next year, with reference to the current year and the in the past adverse circumstances of wire and the enthusiasm condition the most occurred frequently in level year, in stability Calculation work, adopt practicable transmission of electricity limit data, so that the feasible degree of result of calculation significantly improves.
Claims (2)
1. a section power limit emulated computation method of taking into account the circuit Real-time Monitoring Data comprises stabilization of power grids check calculating, it is characterized in that described method has been taken into account the Real-time Monitoring Data of transmission line in the electrical network; By microclimate, wire and the gold utensil temperature survey on-line monitoring equipment that critical circuits in electrical network is installed, Real-time Collection circuit service data, the unified power system monitor center that is sent to; The transmission line Real-time Monitoring Data that application collects improves the accuracy that result of calculation is checked in the stabilization of power grids.
2. the section power limit emulated computation method of taking into account the circuit Real-time Monitoring Data according to claim 1, it is characterized in that, behind the real-time running data of described method critical circuits in obtaining electrical network, the residing environmental aspect of clear and definite transmission line, compare checking computations and assessment stability Calculation result's correctness with completed stabilization of power grids result of calculation; With reference to the transmission line real-time running data, the current power system operating mode of reasonable arrangement and guides the next year stabilization of power grids to check and calculates; In the stability Calculation of next year, with reference to the adverse circumstances of wire in the current year and enthusiasm condition the most occurred frequently, in stability Calculation work from now on, adopt practicable transmission of electricity limit data.
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| CN105281330A (en) * | 2015-11-09 | 2016-01-27 | 山东大学 | Thermal rating method of delivery wind-power transmission line |
| CN109165820A (en) * | 2018-08-06 | 2019-01-08 | 南京理工大学 | A kind of methods of risk assessment of aerial condutor and its splicing fitting excess temperature |
| CN110458405A (en) * | 2019-07-10 | 2019-11-15 | 清华大学 | It is a kind of based on electric power-Characteristics of micrometeorology data power system security method for early warning |
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| CN105281330A (en) * | 2015-11-09 | 2016-01-27 | 山东大学 | Thermal rating method of delivery wind-power transmission line |
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| CN109165820A (en) * | 2018-08-06 | 2019-01-08 | 南京理工大学 | A kind of methods of risk assessment of aerial condutor and its splicing fitting excess temperature |
| CN110458405A (en) * | 2019-07-10 | 2019-11-15 | 清华大学 | It is a kind of based on electric power-Characteristics of micrometeorology data power system security method for early warning |
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Effective date of registration: 20180709 Address after: 330096 No. 88, min Qiang Road, private science and Technology Park, Nanchang, Jiangxi Co-patentee after: State Grid Corporation of China Patentee after: Power Science Research Institute of Jiangxi Electric Power Co., Ltd. Address before: 330088 No. 88, min Qiang Road, private science and Technology Park, Nanchang, Jiangxi Co-patentee before: State Grid Corporation of China Patentee before: Jiangxi Electric Power Science Academy |