CN104300587A - Power grid frequency modulation control system and method based on wind power generation and thermal power generation - Google Patents
Power grid frequency modulation control system and method based on wind power generation and thermal power generation Download PDFInfo
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- CN104300587A CN104300587A CN201410587374.8A CN201410587374A CN104300587A CN 104300587 A CN104300587 A CN 104300587A CN 201410587374 A CN201410587374 A CN 201410587374A CN 104300587 A CN104300587 A CN 104300587A
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a power grid frequency modulation control system and method based on wind power generation and thermal power generation. The system comprises a wind power generation output measuring device. The wind power generation output measuring device transmits generation output data of a wind generator set to a power grid monitoring unit, the power grid monitoring unit is further connected with a transmission network, the power grid monitoring unit issues load commands and frequency modulation task level signals to a thermal generator set control system through an RTU, the thermal generator set control system transmits control information to thermal generator set thermal equipment, the thermal generator set thermal equipment is connected with a generator, and the generator converts mechanical power into electric energy which is transmitted to the transmission network. According to the system and method, the power grid frequency modulation capacity in a wind power rapid development region is improved, the primary frequency modulation capacity and the secondary frequency modulation capacity of the sets are improved, the negative influences of the characteristics that wind power output fluctuation is large and frequency modulation capacity is poor on stable power grid operation are effectively relieved, the power supply quality of a power grid is improved, and the safe operation of the power grid is stabilized.
Description
Technical field
The present invention relates to a kind of power grid frequency modulation control system based on wind power generation and thermal power generation cooperation control and method.
Background technology
At present, the formation of electrical network becomes increasingly complex, and power grid frequency modulation peak regulation pressure is also increasing, and installed capacity of wind-driven power accounts for more than 10% of total installation of generating capacity.Because the randomness of wind-powered electricity generation power self is comparatively large, cause wind-powered electricity generation load fluctuation comparatively large, and then cause the fluctuation of mains frequency, wait the performance of Wind Power Development area of concentration particularly evident coastal.
Due to wind-powered electricity generation self-technique characteristic, the ability participating in power grid frequency modulation is poor, and electrical network lacks again the water power and jet dynamic control with flexible fm capacity, and thus the frequency modulation task of electrical network mainly relies on thermal power generation unit to bear.How better to ensure that mains frequency is stablized, especially Wind Power Development is comparatively fast regional, is an important technology difficult problem of power network safety operation.
Summary of the invention
For solving the deficiency that prior art exists, the invention discloses a kind of power grid frequency modulation control device based on wind-force wind-powered electricity generation and thermal power generation cooperation control and method, the fast frequency hopping ability of the very fast area power grid of Wind Power Development can be improved, promote power grid operation ability.
For achieving the above object, concrete scheme of the present invention is as follows:
Based on the power grid frequency modulation control system of wind power generation and thermal power generation, comprise wind power generation output measurement mechanism, the generated output data of wind turbine generator are sent to power system monitor unit by wind power generation output measurement mechanism, power system monitor unit is also connected with power transmission network, load instruction and frequency modulation task rank signal are issued to thermoelectric generator set control system by RTU telemechanical apparatus by power system monitor unit, control information is sent to thermal power generation unit heat power equipment by thermoelectric generator set control system, generating set heat power equipment is connected with generator, generator just machine power is converted to power delivery to power transmission network.
Based on the method for the power grid frequency modulation control system of wind power generation and thermal power generation, comprise the following steps:
Step one: wind turbine generator is run, wind power generation output measurement mechanism is measured the generated output data of wind turbine generator and is sent to power system monitor unit;
Step 2: the operation of power networks parameter such as power system monitor unit is exerted oneself according to wind power output, thermoelectricity, electric network swim, determine the frequency modulation task rank that in emphasis frequency modulation region, thermal power generation unit need be born, load instruction and frequency modulation task rank signal simultaneously between Optimized Operation key area frequency modulation thermal power generation unit load instruction to the loading zone set, and are issued to thermoelectric generator set control system by RTU telemechanical apparatus by power system monitor unit;
Step 3: control information is sent to thermal power generation unit heat power equipment by thermoelectric generator set control system, generating set heat power equipment is connected with generator, after generator accepts the instruction of power system monitor unit, automatic adjusting machine group is actual exerts oneself to command request place, simultaneously according to the frequency modulation task rank issued by thermoelectric generator set control system automatic adjusting machine group speed governor droop and Changing load-acceleration, change the fm capacity of generating set.
Described operation of power networks parameter comprises wind power output power, thermoelectricity goes out activity of force, network system voltage and electric network swim.
Described generated output data are generating active power.
Described frequency modulation task rank is divided into common mode, compensation way and emergency mode.
It is 75%-85% of rated load between the loading zone of described setting.
Frequency modulation task rank is generally divided into common mode, compensation way, emergency mode.Common mode is generally applied to the less regional power grid of network load change; Compensation way is applied to load fluctuation regional power grid frequently, and such as wind-powered electricity generation load concentrates the regional power grid larger with power load change frequency; Emergency mode when being mainly used in regional power grid load generation ANOMALOUS VARIATIONS, when such as there is generating set large area from electrical network parallel off or the larger input load rejection of regional power grid.
Operation principle: region wind turbine generator is exerted oneself, by measurement mechanism, generated output data delivered to power system monitor unit, power system monitor unit is according to wind power output, thermoelectricity is exerted oneself, the operation of power networks parameters such as electric network swim, calculate and determine the frequency modulation task rank that in emphasis frequency modulation region, fired power generating unit need be born, generally be divided into common mode, compensation way, emergency mode, simultaneously Optimized Operation key area frequency modulation thermal power generation unit load instruction to rated load 75%-85% loading zone between, and by RTU telecontrol equipment, load instruction and frequency modulation task rank signal are issued to thermoelectric generator set control system (DCS), after generating set accepts the instruction of power system monitor unit, automatic adjusting machine group is actual exerts oneself to command request place, arrange according to the frequency modulation task rank automatic adjusting machine group speed governor droop issued and Changing load-acceleration simultaneously, promote unit primary frequency modulation and frequency modulation frequency modulation ability.
Beneficial effect of the present invention:
The present invention devises a kind of power grid frequency modulation control system based on wind power generation and thermal power generation cooperation control and method, by power system monitor unit monitors operation of power networks parameter, according to region wind power output situation, automatic adjustment thermal power generation unit frequency modulation peak regulation controling parameters is arranged, promote thermal power generation unit primary frequency modulation and frequency modulation frequency modulation ability, improve wind-powered electricity generation Rapid developing region electrical network rapid adjustment ability, effective alleviation wind power output fluctuation is large, the features such as fm capacity difference are to the adverse effect of power grid operation, improve mains supply quality, stablize electric power netting safe running.
Accompanying drawing explanation
Fig. 1 total system block diagram of the present invention.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail:
The quick propelling that Shandong Power is built along with ultra high voltage, enter electric loading proportion outside Shandong increasing, wherein " peaceful electricity enters Shandong " bipolar high voltage direct current input electricity 4000MW, by accepting electricity 7100MW with North China Power Telecommunication Network interconnection pungent merely two-wire, yellow shore two-wire, enter that the total dispatch from foreign news agency of Lu accounts for Shandong tracking installed capacity 22%, Large Copacity nuclear power generating sets also will be gone into operation in the near future in addition, and the formation of electrical network becomes increasingly complex, and power grid frequency modulation peak regulation pressure is also increasing.
At present, the maximum installation load of Shandong Power wind power generation reaches 6000MW, and wind-powered electricity generation maximum output breaks through 4000MW, and Shandong Power tracking total installation of generating capacity is about 50000MW, and installed capacity of wind-driven power accounts for more than 10% of total installation of generating capacity.Because the randomness of wind-powered electricity generation power self is comparatively large, cause wind-powered electricity generation load fluctuation comparatively large, and then cause the fluctuation of mains frequency, wait the performance of Wind Power Development area of concentration particularly evident coastal.
Due to wind-powered electricity generation self-technique characteristic, the ability participating in power grid frequency modulation is poor, and Shandong Power lacks again the water power and jet dynamic control with flexible fm capacity, and thus the frequency modulation task of Shandong Power mainly relies on thermal power generation unit to bear.How better to ensure that mains frequency is stablized, especially Wind Power Development is comparatively fast regional, is an important technology difficult problem of power network safety operation.Based on the power grid frequency modulation control system of wind power generation and thermal power generation, mainly comprise wind turbine generator, wind power generation output measuring unit, power system monitor unit, RTU telemechanical apparatus, thermoelectric generator set control system, therrmodynamic system equipment, generator etc., concrete connected mode as shown in Figure 1.Region wind turbine generator is exerted oneself, by measurement mechanism, generated output data is delivered to power system monitor unit, power system monitor unit is according to wind power output, thermoelectricity is exerted oneself, the operation of power networks parameters such as electric network swim, calculate and determine that the frequency modulation task rank that in emphasis frequency modulation region, fired power generating unit need be born (is generally divided into common mode, compensation way, emergency mode), simultaneously between the frequency modulation thermal power generation unit load instruction to the good loading zone of adjusting function of Optimized Operation key area, be generally about 75% of rated load, and by RTU Far East device, load instruction and frequency modulation task rank signal are issued to thermoelectric generator set control system (DCS), after generating set accepts the instruction of power system monitor unit, automatic adjusting machine group is actual exerts oneself to command request place, arrange according to the frequency modulation task rank automatic adjusting machine group speed governor droop issued and Changing load-acceleration simultaneously, promote unit primary frequency modulation and frequency modulation frequency modulation ability, such as when night, wind-powered electricity generation generated output was larger, power grid frequency modulation role pressure is larger, now, power system monitor unit is made by oneself according to grid operating conditions and the primary frequency modulation of emphasis frequency modulation unit is converted into compensation model by general mode, namely reduce unit diversity factor to arrange, increase the Changing load-acceleration of unit simultaneously, promote unit frequency modulation response speed, stablize electric power netting safe running.When mains frequency deviation exceedes mains frequency standard, sending instructions under power system monitor unit proceeds to emergent hopping pattern by generating set hopping pattern, carries out urgent liter or the forced landing of unit load, stable electrical network operation.
The course of work: wind turbine generator is run, the load calculating wind turbine generator through generated output device is exerted oneself, and delivers to power system monitor unit; The monitoring that power system monitor unit completes operation of power networks parameter issues from the control command of the generated output of different generating set; The exchange that RTU communication device and RTU telemechanical apparatus mainly complete unit information and power system monitor unit information is transmitted.Thermoelectric generator set control system (DCS) complete generating set exert oneself adjustment control, be the pith of this patent technology implementation.Thermal power generation unit heat power equipment, as long as perform DCS system to issue control command, adjustment equipment is exerted oneself, and carries work power source to generator.Machine power is converted to electric energy by generator, is delivered to supply network.
Claims (6)
1. based on the power grid frequency modulation control system of wind power generation and thermal power generation, it is characterized in that, comprise wind power generation output measurement mechanism, the generated output data of wind turbine generator are sent to power system monitor unit by wind power generation output measurement mechanism, power system monitor unit is also connected with power transmission network, load instruction and frequency modulation task rank signal are issued to thermoelectric generator set control system by RTU telemechanical apparatus by power system monitor unit, control information is sent to thermal power generation unit heat power equipment by thermoelectric generator set control system, generating set heat power equipment is connected with generator, generator just machine power is converted to power delivery to power transmission network.
2., as claimed in claim 1 based on the method for the power grid frequency modulation control system of wind power generation and thermal power generation, it is characterized in that, comprise the following steps:
Step one: wind turbine generator is run, wind power generation output measurement mechanism is measured the generated output data of wind turbine generator and is sent to power system monitor unit;
Step 2: power system monitor unit, according to operation of power networks parameter, determines the frequency modulation task rank that in emphasis frequency modulation region, thermal power generation unit need be born, simultaneously between Optimized Operation key area frequency modulation thermal power generation unit load instruction to the loading zone set; Load instruction and frequency modulation task rank signal are issued to thermoelectric generator set control system by RTU telecontrol equipment by power system monitor unit;
Step 3: control information is sent to thermal power generation unit heat power equipment by thermoelectric generator set control system, generating set heat power equipment is connected with generator, after generator accepts the instruction of power system monitor unit, automatic adjusting machine group is actual exerts oneself to command request place, arranges according to the frequency modulation task rank automatic adjusting machine group speed governor droop issued and Changing load-acceleration simultaneously.
3., as claimed in claim 2 based on the method for the power grid frequency modulation control system of wind power generation and thermal power generation, it is characterized in that, described operation of power networks parameter comprises wind power output power, thermoelectricity goes out activity of force, network system voltage and electric network swim.
4., as claimed in claim 2 based on the method for the power grid frequency modulation control system of wind power generation and thermal power generation, it is characterized in that, described generated output data are generating set active power.
5., as claimed in claim 2 based on the method for the power grid frequency modulation control system of wind power generation and thermal power generation, it is characterized in that, described frequency modulation task rank is divided into common mode, compensation way and emergency mode.
6., as claimed in claim 2 based on the method for the power grid frequency modulation control system of wind power generation and thermal power generation, it is characterized in that, be the 75%-85% of rated load between the loading zone of described setting.
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Cited By (6)
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| CN104767205A (en) * | 2015-01-29 | 2015-07-08 | 国家电网公司 | Method for establishing automatic generation control system of electric power system based on wind power plant access |
| CN105303267A (en) * | 2015-11-20 | 2016-02-03 | 武汉大学 | Combination optimizing method, considering dynamic frequency constraint, for isolated power grid set comprising high-permeability photovoltaic power supply |
| CN107528349A (en) * | 2017-09-22 | 2017-12-29 | 国网山东省电力公司电力科学研究院 | Thermal power generation unit load gearshift adjustment control method and system based on new energy load |
| CN109828204A (en) * | 2019-03-01 | 2019-05-31 | 广东电网有限责任公司 | For the grid-connected debugging test method of thermoelectricity energy storage joint frequency modulation generating set |
| CN111130096A (en) * | 2019-12-06 | 2020-05-08 | 国网天津市电力公司电力科学研究院 | Parameter calculation-based generator set primary frequency modulation performance evaluation method |
| CN113315176A (en) * | 2021-06-18 | 2021-08-27 | 哈尔滨工业大学 | Primary frequency modulation coordination control method and system of wind-fire combined system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767205A (en) * | 2015-01-29 | 2015-07-08 | 国家电网公司 | Method for establishing automatic generation control system of electric power system based on wind power plant access |
| CN105303267A (en) * | 2015-11-20 | 2016-02-03 | 武汉大学 | Combination optimizing method, considering dynamic frequency constraint, for isolated power grid set comprising high-permeability photovoltaic power supply |
| CN105303267B (en) * | 2015-11-20 | 2020-04-24 | 武汉大学 | Dynamic frequency constraint considered isolated power grid unit combination optimization method containing high-permeability photovoltaic power supply |
| CN107528349A (en) * | 2017-09-22 | 2017-12-29 | 国网山东省电力公司电力科学研究院 | Thermal power generation unit load gearshift adjustment control method and system based on new energy load |
| CN107528349B (en) * | 2017-09-22 | 2019-07-30 | 国网山东省电力公司电力科学研究院 | Thermal power generation unit gearshift adjustment control method and system based on new energy load |
| CN109828204A (en) * | 2019-03-01 | 2019-05-31 | 广东电网有限责任公司 | For the grid-connected debugging test method of thermoelectricity energy storage joint frequency modulation generating set |
| CN111130096A (en) * | 2019-12-06 | 2020-05-08 | 国网天津市电力公司电力科学研究院 | Parameter calculation-based generator set primary frequency modulation performance evaluation method |
| CN113315176A (en) * | 2021-06-18 | 2021-08-27 | 哈尔滨工业大学 | Primary frequency modulation coordination control method and system of wind-fire combined system |
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