CN103855721B - Wind farm monitoring system accesses system and the information switching method of power network dispatching system - Google Patents
Wind farm monitoring system accesses system and the information switching method of power network dispatching system Download PDFInfo
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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
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Abstract
The present invention discloses a kind of wind farm monitoring system and accesses system and the information switching method of power network dispatching system, and system structure includes: automation system for the power network dispatching, comprehensive monitoring system for wind power station, transmission channel；The method of wind energy turbine set and dispatching terminal information exchange mainly, 1) wind energy turbine set is uploaded information by integrated terminal, including electric information, running state information, statistical computation information, weather information, plan information, other information etc.；2) wind energy turbine set receives dispatching terminal information, and including main website control target instruction target word, instruction is moved back in real power control throwing, REACTIVE POWER/VOLTAGE CONTROL is thrown and moved back the information such as instruction, wind energy turbine set generation schedulecurve, voltage curve.The system and method for the application present invention, blower fan can be integrated and transformer station respectively separates long distance control system, Uniform Communication Standard, voltage, meritorious, idle and blower fan, transformer station's compensation equipment operation to wind energy turbine set are optimized, and wind energy turbine set is implemented unified effective management.
Description
Technical field
The present invention relates to a kind of wind farm monitoring system and access system and the information switching method of power network dispatching system, belong to wind power-generating grid-connected technical field.
Background technology
Since the particularly seventies in 20th century, along with the fast development of World Economics, the demand of the energy is doubled and redoubled by the mankind, and energy industry is also with unprecedented scale development.But some problems brought therefrom, also result in the highest attention of many countries.Using coal, oil as the country of main primary energy, not only it is faced with the problem that conventional energy resource is exhausted, and due to a large amount of uses of fossil energy, directly in air, emission greenhouse gas and aerosol etc. cause global warming and the most serious problem of environmental pollution, and natural ecosystems, social economy and health are all constituted serious threat.Develop new forms of energy and have become as world energy sources strategy of sustainable development important component part.
Currently, wind-power electricity generation is that during regenerative resource develops, technology is the most ripe, most exploitation scale and the forms of electricity generation of most commercialized development prospect.Due to its alleviate environmental pollution, readjust the energy structure, the outstanding role of the aspect such as promote sustainable development, wind-power electricity generation is important green energy resource in this century, is one of important alternative energy sources of conventional energy resource generating such as coal.Additionally, wind-powered electricity generation is compared with thermoelectricity, water power and nuclear power, the construction period is short, instant effect, builds a Large Scale Wind Farm Integration and has only to less than year, and therefore the wind-powered electricity generation always world is fastest-rising clean energy resource, has good development prospect.Since the eighties in 20th century, the Chinese government also has been working hard promote the development of wind-power electricity generation, has successively promulgated the policies and regulations that multinomial excitation wind-power electricity generation develops, has effectively promoted the flourish of China's wind-power electricity generation.The first half of the year in 2010, National Energy Board was the clearest and the most definite: national wind-powered electricity generation planning installation 90,000,000 kW(kW Han offshore wind farm 5,000,000 in 2015), the year two thousand twenty whole nation wind-powered electricity generation planning installation 1.5 hundred million kW(kW Han offshore wind farm 30,000,000).China's newly-increased installation Wind turbines 10129 in 2009, capacity reaches 13803.2MW；Accumulative installation 21544,25805.3MW.As can be seen here along with the continuous expansion of wind energy turbine set installed capacity, the impact of Wind Power Generation on Power System will be the most notable.
The Design of Monitoring and Control System of integrated wind plant access dispatching end, construction and operational management need further specification.There is the situation overlapping unit control system in wind energy turbine set, the complete open communication of unit and control interface, without unified communication protocol or agreement between wind energy turbine set and grid dispatching center more owing to installing different type of machines.This causes dispatching control center cannot realize the control of the power to wind energy turbine set, it is impossible to meet wind-powered electricity generation and electric network coordination service requirement；So needing to exchange between unified standard integrated wind plant and scheduling schedule information, making and meeting the monitoring system allocation plan that Jiangsu wind-powered electricity generation is actual.The most both ensured the integrity that data unit operation gathers, control in real time and regulation that wind energy turbine set is gained merit by dispatching control center can have been realized again.
Summary of the invention
For solving the problems referred to above, the present invention discloses a kind of wind farm monitoring system and accesses the system and method for automation system for the power network dispatching, information can be exchanged between unified standard integrated wind plant and scheduling, both ensured the integrity that data unit operation gathers, control in real time and regulation that wind energy turbine set is gained merit by dispatching control center can have been realized again.
The technical solution used in the present invention is as follows:
Wind farm monitoring system accesses the system of power network dispatching system, including: automation system for the power network dispatching, comprehensive monitoring system for wind power station and transmission channel, wherein,
Automation system for the power network dispatching includes EMS system and planning system/wind power prediction system two parts, described EMS system manages/controls terminal by I district transmission channel with the plant stand integrated communication of comprehensive monitoring system for wind power station and is connected, Real-time Collection plant stand integrated communication manages/controls the information of terminal, and issues real power control, reactive power/voltage control instruction to plant stand；Described planning system/wind power prediction system is connected with planning system/this locality wind power prediction system of comprehensive monitoring system for wind power station by II district transmission channel, is responsible for gathering weather information and plan information from wind energy turbine set, issues wind-powered electricity generation generation schedule；Described EMS system is to planning system/wind power prediction system output generation schedule, real power control instruction, idle control instruction and reactive power/voltage control curve, and receives the wind power prediction result of planning system/wind power prediction system；
Comprehensive monitoring system for wind power station is divided into safety Ith district and safety II district's two parts, described safety I district monitors for electric field, manage/control terminal and the fan monitoring/blower fan centralized control system being attached thereto including plant stand integrated communication, reactive power compensator, booster stations monitoring system and meteorological information collection system, described plant stand integrated communication manages/controls terminal and is arranged on wind energy turbine set locality；Described safety II district is used for wind power prediction, and including planning system/this locality wind power prediction system, described planning system/this locality wind power prediction system is managed subsystem by wind power prediction subsystem and generation schedule and constitutes；
Transmission channel includes I district transmission channel and II district transmission channel, transmit for the data between automation system for the power network dispatching and comprehensive monitoring system for wind power station, described I district transmission channel and II district transmission channel are by router, longitudinal encryption device and switch are sequentially connected with composition, the router of described I district transmission channel accesses the EMS system that province adjusts or ground is adjusted, the router of described II district transmission channel accesses planning system/wind power prediction system that province adjusts or ground is adjusted, router is after longitudinal encryption device, access switch, the switch of I district transmission channel accesses plant stand integrated communication and manages/control terminal, the switch of II district transmission channel accesses the power prediction server of wind power prediction subsystem.
Aforesaid province adjusts, adjust and realize the mutual of between power dispatch system operation and management terminal information by management and running Information Network, described management and running Information Network includes router, fire wall and the switch being sequentially connected with, described router accesses and saves ground management and running Information Network, described switch access dispatching operation management terminal.
The system utilizing wind farm monitoring system to access power network dispatching system realizes wind energy turbine set and power network dispatching system information switching method, comprises the steps:
1) plant stand integrated communication manages/controls terminal and communicates with wind energy turbine set booster stations monitoring system, fan monitoring/blower fan centralized control system, reactive power compensator, meteorological information collection system, gather the real time information of each system, gather plant stand in real time and historical information, and real time data is uploaded to by I district transmission channel the EMS system of automation system for the power network dispatching；
2) automation system for the power network dispatching receives power plant and substation's information, and issues real power control, reactive power/voltage control instruction to plant stand, and meritorious, REACTIVE POWER/VOLTAGE CONTROL is thrown and moved back instruction, and relevant limit value is arranged instruction；
3) plant stand integrated communication manages/controls terminal and receives control instruction, carries out that wind energy turbine set is meritorious, reactive power/voltage control and regulation；
4) wind energy turbine set gathers weather information and plan information, and by II district transmission channel, information is uploaded to planning system/wind power prediction system；
5) planning system/wind power prediction system issues wind-powered electricity generation generation schedule；
6) the wind energy turbine set generation schedulecurve that wind energy turbine set automatic reception dispatch automated system issues, and press generation schedulecurve operation.
The information that aforesaid step 1) wind energy turbine set uploads to automation system for the power network dispatching by I district transmission channel includes:
Electric information: with/without merit power, voltage, electric current, frequency；
Running status: the throwing of switch/disconnecting link, fan operation, function is moved back, equipment alarm；
Statistical computation: start capacity, shutdown active volume, maintenance capacity, limit power capacity, communicating interrupt capacity；
Out of Memory: machine group # and capacity；
The information that described step 4) wind energy turbine set uploads to automation system for the power network dispatching by II district transmission channel includes:
Weather information: wind speed, wind direction, temperature, humidity, air pressure；
Plan information: wind power prediction result.
In aforesaid step 3), plant stand integrated communication manages/controls terminal and carries out wind energy turbine set real power control and regulation, particularly as follows: the AGC that wind energy turbine set accepts dispatch automated system controls, control object is whole audience generating real power control, the meritorious instruction of dispatch automated system is handed down to plant stand integrated communication and manages/control terminal, plant stand integrated communication manages/controls terminal optimized distributes to fan monitoring system, fan monitoring system control that blower fan is meritorious exerts oneself.
In aforesaid step 3), plant stand integrated communication manages/controls terminal and carries out the idle control of wind energy turbine set and regulation, particularly as follows: wind power plant reactive voltage controls to use the idle distribution principle of AVC, with wind energy turbine set high side bus voltage for controlling target, when normally receiving the high side bus voltage control target that dispatch automated system issues, various control objects in can automatically controlling wind energy turbine set, it is achieved high side bus voltage follows the control target of dispatch automated system；When with dispatching patcher communication disruption, it is possible to according to the mode of closed loop on the spot, be controlled according to previously given high side bus voltage aim curve.
It is 4 bit digital that aforesaid AVC reactive voltage regulation desired value issues the coded format of mode, and wherein, encoded radio thousands digit represents regulation increase and decrease direction, and 2 represent and raise, and 1 represents and lowers, and non-the two numeral is considered miscommunication；Hundreds is an enumerator, circulates from 1-5, ensures that this position is different from upper subcommand during each transmitting order to lower levels of main website, substation preserves bid value last time, if it find that new value is different from last time, is taken as have received new order, if this figure place is not in the range of 1-5, it is believed that this order is illegal；Tens and units represent increment of adjustment, and the regulation in conjunction with thousands digit increases and decreases direction, determines how to revise target voltage setting value.
By using above-mentioned technological means, the invention have the benefit that
The present invention is according to the present situation of wind electric field blower Yu substation central monitoring system, integrate blower fan and each discrete long distance control system of transformer station, Uniform Communication Standard, by the exchange of operation information between wind energy turbine set and scheduling, using whole wind energy turbine set as an entirety, voltage, meritorious, idle and blower fan, transformer station's compensation equipment operation to wind energy turbine set are optimized, and wind energy turbine set is implemented unified effective operational management.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram that wind farm monitoring system of the present invention accesses power network dispatching system；
Fig. 2 is the structured flowchart that wind energy turbine set of the present invention is mutual with dispatching of power netwoks client information；
Fig. 3 is the structural representation of transmission channel of the present invention；
Fig. 4 is active power set value calculation test structure figure of the present invention；
Fig. 5 is active power of wind power field set point change scope curve chart of the present invention；
Fig. 6 is the contrast oscillogram of active power desired value of the present invention and measured value；
Fig. 7 is reactive power/voltage control of the present invention regulation detection data collection point schematic diagram；
Fig. 8 is that reactive voltage of the present invention regulates flow chart；
Fig. 9 is that wind field voltage of the present invention raises curve chart.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the solution of the present invention is carried out clear, complete description.
As it is shown in figure 1, the wind farm monitoring system of the present invention accesses the system of power network dispatching system, including: automation system for the power network dispatching, comprehensive monitoring system for wind power station and transmission channel, wherein,
Automation system for the power network dispatching includes EMS system and planning system/wind power prediction system two parts, EMS system is the EMS in automation system for the power network dispatching, manage/control terminal by I district transmission channel with the plant stand integrated communication of comprehensive monitoring system for wind power station to be connected, Real-time Collection plant stand integrated communication manages/controls the information of terminal, and issues real power control, reactive power/voltage control instruction to plant stand；Described planning system/wind power prediction system is connected with planning system/this locality wind power prediction system of comprehensive monitoring system for wind power station by II district transmission channel, is responsible for gathering weather information and plan information from wind energy turbine set, issues wind-powered electricity generation generation schedule；Inside automation system for the power network dispatching, EMS system is to planning system/wind power prediction system output generation schedule, real power control instruction, idle control instruction and reactive power/voltage control curve, and receives the power prediction result of planning system/wind power prediction system.
Comprehensive monitoring system for wind power station is divided into safety Ith district and safety II district's two parts, as shown in Figure 2, safety Ith district monitors for electric field, manage/control terminal and the fan monitoring/blower fan centralized control system being attached thereto including plant stand integrated communication, reactive power compensator, booster stations monitoring system and meteorological information collection system, each system and plant stand integrated communication manage/control the data communication of terminal and preferably use network schemer.Plant stand integrated communication manages/controls terminal and uses Open architecture, provides redundancy, the network system of support distributed processing environment, it is local that it is arranged on wind energy turbine set, processs of data acquisition, data, data communication, blower fan gain merit automatically control, the function such as REACTIVE POWER/VOLTAGE closed loop control.Plant stand integrated communication manages/controls terminal Real-time Collection wind energy turbine set booster stations monitoring system, fan monitoring system, reactive power compensator and the information of meteorological information collection system, gather the real-time of plant stand and historical information, and real time data is uploaded to dispatch automated system by transmission channel, receive meritorious/idle regulating control command from dispatching patcher simultaneously, optimize and distribution control strategy, and coordinate control with the equipment such as fan monitoring system, reactive compensator controller.Plant stand integrated communication manages/controls terminal and supports respective communication stipulations and agreement, complete the exchange of various information and the data communication with dispatching patcher with in wind energy turbine set, wind energy turbine set relevant device at least supports the one in used communication protocol and agreement, and the information completing to control management terminal with AGC/AVC exchanges.Safety IIth district is for wind power prediction, and including planning system/this locality wind power prediction system, described planning system/this locality wind power prediction system is managed subsystem by wind power prediction subsystem and generation schedule and constitutes.
Transmission channel is dispatch data net, including I district transmission channel and II district transmission channel, transmit for the data between automation system for the power network dispatching and comprehensive monitoring system for wind power station, I district transmission channel be mainly responsible for EMS system in real time and historical information, reactive power compensator are real-time and the collection of historical information, and the instruction of dispatching patcher real power control, the issuing of reactive power/voltage control instruction, II district transmission channel be mainly responsible for wind energy turbine set this locality power prediction result on send and the issuing of dispatching patcher wind-powered electricity generation generation schedule.As shown in Figures 2 and 3, wherein I district transmission channel and II district transmission channel are by router, longitudinal encryption device and switch are sequentially connected with composition, the router of described I district transmission channel accesses the EMS system that province adjusts or ground is adjusted, the router of described II district transmission channel accesses planning system/wind power prediction system that province adjusts or ground is adjusted, router is after longitudinal encryption device, access switch, the switch of I district transmission channel accesses plant stand integrated communication and manages/control terminal, the switch of II district transmission channel accesses the power prediction server of wind power prediction subsystem.
Additionally, save adjust, adjust and realize the mutual of between power dispatch system operation and management terminal information by management and running Information Network, described management and running Information Network includes router, fire wall and the switch being sequentially connected with, described router accesses and saves ground management and running Information Network, described switch access dispatching operation management terminal.
The system utilizing the wind farm monitoring system access power network dispatching system of the present invention realizes the information switching method of wind energy turbine set and power network dispatching system, comprises the steps:
1) plant stand integrated communication manages/controls terminal and communicates with wind energy turbine set booster stations monitoring system, fan monitoring/blower fan centralized control system, reactive power compensator, meteorological information collection system, gather the real time information of each system, gather plant stand in real time and historical information, and real time data is uploaded to by I district transmission channel the EMS system of automation system for the power network dispatching；
Plant stand integrated communication manages/controls the real time information of terminal collection and includes:
Electric information (analog quantity): with/without merit (MW/MVar), voltage (kV), electric current (A), frequency (Hz)；
Running status (quantity of state): switch/disconnecting link (state), fan operation (state), function are thrown and moved back (wind energy turbine set meritorious, REACTIVE POWER/VOLTAGE CONTROL state), equipment alarm (state)；
Statistical computation (analog quantity): start capacity (operation), shutdown active volume (standby), maintenance capacity (containing outage capacity, artificial shutdown capacity etc.) (MW), limit power capacity, communicating interrupt capacity；
Out of Memory: machine group # and capacity etc..
2) automation system for the power network dispatching gathers power plant and substation's information, and issues real power control, reactive power/voltage control instruction to plant stand, and meritorious, REACTIVE POWER/VOLTAGE CONTROL is thrown and moved back instruction, and relevant limit value is arranged instruction.
3) plant stand integrated communication manages/controls terminal and receives control instruction, carries out that wind energy turbine set is meritorious, reactive power/voltage control and regulation.
4) wind energy turbine set gathers weather information and plan information, and by II district transmission channel, information is uploaded to planning system/wind power prediction system.Wherein,
Weather information (analog quantity), including wind speed, wind direction, temperature, humidity, air pressure etc.；
Plan information is mainly wind power prediction result.
5) planning system/wind power prediction system issues wind-powered electricity generation generation schedule, predominantly wind energy turbine set generation schedulecurve.
6) the wind energy turbine set generation schedulecurve that wind energy turbine set automatic reception dispatch automated system issues, and press generation schedulecurve operation.
In step 3), in meritorious, the reactive power/voltage control of wind energy turbine set and regulation, wind energy turbine set real power control possesses the different operational mode such as setting, scheduling controlling, Plan Curve on the spot, and possesses handoff functionality.Wind energy turbine set can accept dispatching patcher automatic generation amount and control (AGC), control object is whole audience generating real power control, dispatching patcher instruction of gaining merit is handed down to plant stand integrated communication and manages/control terminal, plant stand integrated communication manages/controls terminal optimized distributes to fan monitoring system, fan monitoring system control that blower fan is meritorious exerts oneself.
Wind power plant reactive voltage controls to use voltage and reactive power automatic control (AVC) idle distribution principle, with wind energy turbine set high side bus voltage for controlling target, when normally receiving the high side bus voltage control target that dispatch automated system issues, various control objects in can automatically controlling wind energy turbine set, it is achieved high side bus voltage follows the control target of dispatch automated system；When with dispatching patcher communication disruption, it is possible to according to the mode of closed loop on the spot, be controlled according to previously given high side bus voltage aim curve.
In order to realize wind energy turbine set AVC reactive voltage regulatory function, the present invention has worked out wind energy turbine set AVC voltage-regulation desired value coded format, meets following condition:
1) AVC voltage-target issues mode coded format is 4 bit digital；
2) encoded radio thousands digit represents regulation increase and decrease direction, and 2 represent that rise, 1 expression are lowered, and other data are considered miscommunication；
3) hundreds is an enumerator, circulate from 1-5, ensure that this position is different from upper subcommand during each transmitting order to lower levels of main website, substation preserves bid value last time, if it find that new value is different from last time, it is taken as have received new order, if this figure place is not in the range of 1-5, it is believed that this order is illegal；
4) tens and units represent increment of adjustment, and as " 27 " represent that increment is 2.7kV, the regulation in conjunction with kilobit increases and decreases direction, determines how to revise target voltage setting value, and " 0 " represents that increment is 0.
As: dispatching down distributing " 2143 ", first " 2 " represent rise, and second " 1 " is rotation bit, and last two " 43 " represent that the amplitude that voltage raises is 4.3kV.
The integrated terminal of wind energy turbine set reaches desired value simultaneously controlling wind energy turbine set high side bus voltage, also reply blower fan set end voltage and collect line bus voltage and carry out effective monitoring, it is ensured that magnitude of voltage is the most out-of-limit.
The basic function of reactive power/voltage control and regulation requires as follows:
1) wind energy turbine set installs the dynamic reactive compensation device with automatic voltage regulating power, and main transformer uses ULTC.
2) the AVC substation of wind energy turbine set coordinates optimal control to reactive power compensator and the blower fan Reactive-power control ability of wind energy turbine set, makes full use of the Reactive-power control ability of blower fan or other devices under normal circumstances, keeps the fast reactive deposit of dynamic reactive compensation device.
3) voltage control instructions that the integrated terminal automatic reception scheduling station system of wind energy turbine set issues, and by controlling Reactive Compensation in Wind Farm device or blower fan is idle exerts oneself, controls wind energy turbine set voltage and meets and control requirement.
4) integrated terminal of wind energy turbine set possesses local control function.When substation and scheduling station because of the reasons such as communication abnormality, main website stoppage in transit cannot realize online with scheduling station closed loop control time, after AVC substation judges, substation enters local control model (may be configured as continuous 3 control cycles do not receive remote regulating instruct).Local control model should perform province and adjust the voltage curve issued quarterly.After substation and scheduling station communication recovery are normal, substation can automatically switch to and scheduling station closed loop control.
5) wind energy turbine set such as uses grouping switching/voltage regulating imaginary power compensation way, then need to consider order and the number of times of compensation device action, and balanced；Consider that the coordination that itself and blower fan are idle and dynamic reactive compensation device is idle controls simultaneously.
6) when the Reactive-power control scarce capacity of wind energy turbine set, send a warning message to scheduling station system.
7) in order to ensure that wind energy turbine set possesses rapid adjustability under accident conditions, wind energy turbine set dynamic reactive compensation device must use idle control model.Dynamic reactive compensation device responds the idle control instruction of integrated terminal in the steady state, in case of a fault can independently quick acting, eliminate the unusual fluctuations of voltage.
8) integrated terminal of wind energy turbine set considers the coordination of wind energy turbine set dynamic passive compensation dress and other devices.Have been sent from such as dynamic reactive compensation device in the steady state or absorb more idle, can be on the premise of ensureing that voltage is steadily, dynamic reactive compensation device sent or idle cementing out of absorbing with blower fan is idle, it is ensured that dynamic reactive compensation device can quick effective action in case of a fault.
System and method for the display present invention can integrate each discrete long distance control system of existing blower fan and transformer station, wind energy turbine set is implemented unified effective operational management, in following two embodiment, real power control regulation will be carried out in wind energy turbine set respectively and regulate with reactive power/voltage control.
Embodiment 1: one wind energy turbine set installed capacity 52MW, totally 26 2.0MW blower fans put into operation, and possess meritorious regulatory function.Active power output valve and the carrying out practically scope of wind energy turbine set are determined by power dispatching station, Fig. 4 is active power of wind power field set value calculation test structure figure, data acquisition for electric energy instrument gathers the on high-tension side electric current of main transformer, voltage at fault oscillograph screen, and calculate active power, Intelligent management terminal, data acquisition for electric energy instrument and be mounted with that the computer of data acquisition for electric energy instrument management program is connected by Ethernet.Electric power saving dispatching control center issues meritorious regulating command by data network, after Intelligent management terminal receives instruction, is transmitted to blower fan energy system and is allowed to regulate, and meanwhile Intelligent management terminal forwards a road to manage system to data acquisition for electric energy.Power Output for Wind Power Field more than 75% rated power time, this wind energy turbine set tracking fixed valure run ability and provide test curve.Fig. 5 is active power of wind power field set point change scope curve, particularly as follows: active power of wind power field output drops to 20% from 80%, each range of decrease is 20%, at each control point continuous service 4min；Active power rises to 80% from 20% subsequently, and each increasing degree is 20%, at each control point continuous service 4min.According to wind energy turbine set of the present invention and dispatching terminal information switching method, the comparing result of active power desired value and measured value is as shown in Figure 6.Wherein: actual measurement change curve and regulation goal change curve are the most identical, stablize deviation less than the 5% of wind energy turbine set installed capacity, response time be less than 120 seconds, be satisfied by demand of technical standard.
Embodiment 2: one wind energy turbine set installed capacity 52MW, totally 26 2.0MW blower fans put into operation, and possess Reactive-power control function.Wind energy turbine set is run continuously, and reactive power/voltage control regulation detection data collection point is as it is shown in fig. 7, gather #2 main transformer three-phase voltage, three-phase current in wind energy turbine set fault oscillograph screen.Particularly as follows: issued target by dispatching patcher, according to the idle distribution principle of AVC, main transformer high side voltage adjusts according to the desired value set, observes and note down virtual voltage response condition, response time.As shown in Figure 8, the detailed process of reactive voltage regulation is: saves and adjusts AVC regulating command to issue, if device Reactive-power control does not puts into, terminates；If Reactive-power control function puts into, intelligent apparatus then receives scheduling AVC regulating command, starts reactive voltage regulation process.Judge that reactive apparatus puts into situation, if reactive apparatus does not puts into, terminate process, otherwise determine regulation flow process according to following three kinds of situations: 1) if only static passive compensation device (SVC) puts into, device calculates Reactive-power control value according to dispatching down distributing voltage-regulation target, and issues Reactive-power control and instruct to SVC；Judging whether voltage reaches desired value, if reaching, terminating process, otherwise return previous step and recalculate regulation without work value.2) if only blower fan Reactive-power control function puts into, device calculates Reactive-power control value according to dispatching down distributing voltage-regulation target, and issues Reactive-power control instruction fan system；Judging whether voltage reaches desired value, if reaching, terminating process, otherwise return previous step and recalculate regulation without work value.3) if SVC, blower fan Reactive-power control function all put into, device calculates Reactive-power control value according to dispatching down distributing voltage-regulation target, and issues Reactive-power control and instruct to SVC；Judge whether voltage reaches desired value, if reaching, terminate process, if miss the mark value, return previous step and recalculate regulation without work value, if SVC reaches to regulate the upper limit is still not up to voltage-regulation desired value, device calculates Reactive-power control value according to dispatching down distributing voltage-regulation target, and issues Reactive-power control instruction fan system；Again judging whether voltage reaches desired value, if reaching, terminating process, otherwise return previous step and recalculate regulation without work value.
The target voltage of wind energy turbine set voltage rise is with the comparing result of burning voltage as shown in Figure 9.Wherein: #2 main transformer high-pressure side actual measurement voltage is compared with regulation goal voltage, the time used by desired value that reaches for the first time during regulation, then this wind energy turbine set AVC governing response time met " response time of reactive voltage control system should be less than 30s " requirement in technical specification for voltage-regulation response time.
Claims (4)
1. wind farm monitoring system accesses the information switching method of power network dispatching system, it is characterised in that comprise the steps:
1) build wind farm monitoring system and access the system of power network dispatching system, including: automation system for the power network dispatching, comprehensive monitoring system for wind power station and transmission channel, wherein,
Automation system for the power network dispatching includes EMS system and planning system/wind power prediction system two parts, described EMS system manages/controls terminal by I district transmission channel with the plant stand integrated communication of comprehensive monitoring system for wind power station and is connected, Real-time Collection plant stand integrated communication manages/controls the information of terminal, and issues real power control, reactive power/voltage control instruction to plant stand；Described planning system/wind power prediction system is connected with planning system/this locality wind power prediction system of comprehensive monitoring system for wind power station by II district transmission channel, is responsible for gathering weather information and plan information from wind energy turbine set, issues wind-powered electricity generation generation schedule；Described EMS system is to planning system/wind power prediction system output generation schedule, real power control instruction, idle control instruction and reactive power/voltage control curve, and receives the wind power prediction result of planning system/wind power prediction system；
Comprehensive monitoring system for wind power station is divided into safety Ith district and safety II district's two parts, described safety I district monitors for electric field, manage/control terminal and the fan monitoring/blower fan centralized control system being attached thereto including plant stand integrated communication, reactive power compensator, booster stations monitoring system and meteorological information collection system, described plant stand integrated communication manages/controls terminal and is arranged on wind energy turbine set locality；Described safety II district is used for wind power prediction, and including planning system/this locality wind power prediction system, described planning system/this locality wind power prediction system is managed subsystem by wind power prediction subsystem and generation schedule and constitutes；
Transmission channel includes I district transmission channel and II district transmission channel, transmit for the data between automation system for the power network dispatching and comprehensive monitoring system for wind power station, described I district transmission channel and II district transmission channel are by router, longitudinal encryption device and switch are sequentially connected with composition, the router of described I district transmission channel accesses the EMS system that province adjusts or ground is adjusted, the router of described II district transmission channel accesses planning system/wind power prediction system that province adjusts or ground is adjusted, router is after longitudinal encryption device, access switch, the switch of I district transmission channel accesses plant stand integrated communication and manages/control terminal, the switch of II district transmission channel accesses the power prediction server of wind power prediction subsystem；
2) plant stand integrated communication manages/controls terminal and communicates with wind energy turbine set booster stations monitoring system, fan monitoring/blower fan centralized control system, reactive power compensator, meteorological information collection system, gather the real time information of each system, gather plant stand in real time and historical information, and real time data is uploaded to by I district transmission channel the EMS system of automation system for the power network dispatching；
3) automation system for the power network dispatching receives power plant and substation's information, and issues real power control, reactive power/voltage control instruction to plant stand, and meritorious, REACTIVE POWER/VOLTAGE CONTROL is thrown and moved back instruction；
4) plant stand integrated communication manages/controls terminal and receives control instruction, carries out that wind energy turbine set is meritorious, reactive power/voltage control and regulation；Described plant stand integrated communication manages/controls terminal and carries out wind energy turbine set real power control and regulation, particularly as follows: the AGC that wind energy turbine set accepts dispatch automated system controls, control object is whole audience generating real power control, the meritorious instruction of dispatch automated system is handed down to plant stand integrated communication and manages/control terminal, plant stand integrated communication manages/controls terminal optimized distributes to fan monitoring/blower fan centralized control system, fan monitoring/blower fan centralized control system control that blower fan is meritorious exerts oneself；Described plant stand integrated communication manages/controls terminal and carries out the idle control of wind energy turbine set and regulation, particularly as follows: wind power plant reactive voltage controls to use the idle distribution principle of AVC, with wind energy turbine set high side bus voltage for controlling target, when normally receiving the high side bus voltage control target that dispatch automated system issues, various control objects in can automatically controlling wind energy turbine set, it is achieved high side bus voltage follows the control target of dispatch automated system；When with dispatching patcher communication disruption, it is possible to according to the mode of closed loop on the spot, be controlled according to previously given high side bus voltage aim curve；
5) wind energy turbine set gathers weather information and plan information, and by II district transmission channel, information is uploaded to planning system/wind power prediction system；
6) planning system/wind power prediction system issues wind-powered electricity generation generation schedule；
7) the wind energy turbine set generation schedulecurve that wind energy turbine set automatic reception dispatch automated system issues, and press generation schedulecurve operation.
Method the most according to claim 1, it is characterized in that, described province adjusts, adjust and realize the mutual of between power dispatch system operation and management terminal information by management and running Information Network, described management and running Information Network includes router, fire wall and the switch being sequentially connected with, described router accesses and saves ground management and running Information Network, described switch access dispatching operation management terminal.
Method the most according to claim 1, it is characterised in that described step 2) the wind energy turbine set information that uploads to automation system for the power network dispatching by I district transmission channel includes:
Electric information: with/without merit power, voltage, electric current, frequency；
Running status: the throwing of switch/disconnecting link, fan operation, function is moved back, equipment alarm；
Statistical computation: start capacity, shutdown active volume, maintenance capacity, limit power capacity, communicating interrupt capacity；
Out of Memory: machine group # and capacity；
The information that described step 4) wind energy turbine set uploads to automation system for the power network dispatching by II district transmission channel includes:
Weather information: wind speed, wind direction, temperature, humidity, air pressure；
Plan information: wind power prediction result.
Method the most according to claim 1, it is characterized in that, it is 4 bit digital that the high side bus voltage control target that described dispatch automated system issues issues the coded format of mode, wherein, encoded radio thousands digit represents regulation increase and decrease direction, 2 represent rise, and 1 represents downward, and non-the two numeral is considered miscommunication；Hundreds is an enumerator, circulates from 1-5, ensures that this position is different from upper subcommand during each transmitting order to lower levels of main website, substation preserves bid value last time, if it find that new value is different from last time, is taken as have received new order, if this figure place is not in the range of 1-5, it is believed that this order is illegal；Tens and units represent increment of adjustment, and the regulation in conjunction with thousands digit increases and decreases direction, determines how to revise target voltage setting value.
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