CN102818951B - Method, system and device for measuring performance index of wind power unit converter on line - Google Patents
Method, system and device for measuring performance index of wind power unit converter on line Download PDFInfo
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- CN102818951B CN102818951B CN201210265627.0A CN201210265627A CN102818951B CN 102818951 B CN102818951 B CN 102818951B CN 201210265627 A CN201210265627 A CN 201210265627A CN 102818951 B CN102818951 B CN 102818951B
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Abstract
The invention relates to a method, a system and a device for measuring a performance index of a wind power unit converter on line. The method comprises the following steps: the torque setting after the low voltage ride through is finished is modified to a setting mode in a step response way; a low voltage ride through test is conducted; data in a master control programmable logic controller (PLC) is collected in real time; the data of a master control set torque and a converter feedback torque is recorded; and the delay time, rise time and adjusting time of 2% criterionwhich are responded by the converter feedback torque are calculated. The system comprises a data acquisition module, a data recording module and an index calculation module. The device comprises a master control PLC and a measuring PLC. With the utilization of the low voltage ride through test or spot check test conditions of the wind power unit, the performance index of the wind power unit converter mounted in a wind power plant spot is measured on line by modifying the low voltage ride through control strategy of the master control and matching a corresponding acquisition device.
Description
Technical field
The present invention relates to a kind of technical field of wind power generation, particularly relate to a kind of mthods, systems and devices of on-line measurement wind power unit converter performance index.
Background technology
In recent years along with wind-power electricity generation constantly develops, wind energy turbine set installed capacity is risen year by year, and the ratio shared by wind-power electricity generation is increasing, becomes a kind of conventional energy resources gradually.In Wind turbines, current transformer is as one of core component, and its performance has vital impact to Wind turbines.Due to developing rapidly of several years ago wind-powered electricity generation, the much current performance index of wind power unit converter running so high unlike supplier's nominal.But due to the factor such as shortage of measuring means originally, the problem left over by history caused has started to create impact to the control performance of Wind turbines.
Therefore, to the testing performance index that the operating wind power unit converter of wind energy turbine set is correlated with, the overall performance that can be Wind turbines provides test to ensure.Meanwhile, consider the feasibility of test job, on-line testing is the preferred manner of test job.Test obtains the performance index of current transformer, can verify current transformer electrical model and revise, and is not only conducive to the improved though proposing current transformer, is more conducive to being optimized Wind turbines master control strategy, improve the performance of complete machine.
For master control strategy, the performance index of wind power unit converter mainly comprise time delay, rise time etc., and this just needs step response test system being carried out to torque.Because Wind turbines is in the on-the-spot normal operation of wind energy turbine set, when carrying out torque step response, easily causes the theft-resistant link chain faults such as system overspeeds and test cannot be completed, and there is certain safety hazards.
But, under current present situation, still cannot carry out the on-line testing of performance index at the current transformer of wind energy turbine set operation.In order to obtain corresponding performance index, often can only carry out dependence test to similar current transformer model in laboratory conditions, and thinking that the current transformer of on-line operation has similar performance.But this kind of method has obvious limitation, because some products upgrade, and the properties of product after upgrading are often better than the old product of wind energy turbine set on-line operation, therefore do not have enough cogencyes.So, online performance test is carried out to wind power unit converter, more can accurately obtain the performance index of on-line operation current transformer.
In order to consider the security of Wind turbines, consider that each wind energy turbine set is all carrying out low voltage crossing sampling observation work now simultaneously, therefore, the condition of torque change in low voltage crossing process is utilized to carry out step response test, realize current transformer testing performance index, both ensure that the safety of Wind turbines, in turn simplify the complicated preliminary work of test current transformer separately, and be easy to realize.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of mthods, systems and devices of on-line measurement wind power unit converter performance index, make it can utilize the test condition of LVRT Capability of Wind Turbine Generator test or sampling observation, by revising the low voltage crossing control strategy of master control, coordinate corresponding harvester, on-line performance index measurement is carried out to the wind power unit converter being arranged on wind energy turbine set scene.
For solving the problems of the technologies described above, the method of a kind of on-line measurement wind power unit converter of the present invention performance index, comprise the following steps: A. revises the low voltage crossing control strategy of master control, the given given way being revised as step response of the torque after being terminated by low voltage crossing; B. start Wind turbines, carry out low voltage crossing test; C. the given torque of master control in Real-time Collection main control PLC and current transformer feedback torque; D. the data of the given torque of master control and current transformer feedback torque are recorded; E. the regulating time of the time delay of current transformer feedback torque response, rise time and 2% criterion is calculated.
As further improvement, in described step C, the data of collection also comprise the low voltage crossing signal that current transformer sends; In described step D, when collecting the generation of low voltage crossing signal, then start the data recording the given torque of master control and current transformer feedback torque.
In addition, present invention also offers a kind of system of on-line measurement wind power unit converter performance index, comprising: data acquisition module, for the data in Real-time Collection main control PLC; Data recordin module, for the data record of the given torque of master control and current transformer feedback torque; And index calculate module, for calculating the time delay of current transformer feedback torque response, the regulating time of rise time and 2% criterion.
Finally, present invention also offers a kind of device of on-line measurement wind power unit converter performance index, comprising: send the given instruction of torque to current transformer, and gather the main control PLC of current transformer real time data and electric network information; And be connected with main control PLC, and be built-in with the measurement PLC of data acquisition module, data recordin module and index calculate module.
As further improvement, described main control PLC is connected by network communication with measurement PLC.
After adopting such design, the present invention has following beneficial effect:
1, solving the wind power unit converter performance index run at the scene cannot the problem of on-line measurement;
2, utilize low voltage crossing signal as the trigger pip of data record and index computing, greatly reduce memory data output, and unattended automatic measurement can be realized, can be implemented in (non-low voltage crossing test) in wind energy turbine set conventional operation, line voltage falls when causing low voltage crossing and automatically carries out the measurement of current transformer performance index;
3, gathered the data of master control system by network communication mode, hardware modifications is little, realizes easily, and feasibility is comparatively strong, and cost is lower, is beneficial to popularization.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the connection diagram of the device of on-line measurement wind power unit converter performance index of the present invention.
Fig. 2 is the system composition schematic diagram measuring the built-in on-line measurement wind power unit converter performance index of PLC of the present invention.
Fig. 3 is the performance index schematic diagram of current transformer.
Embodiment
Refer to shown in Fig. 1, the device of on-line measurement wind power unit converter performance index of the present invention, in order to realize measuring current transformer performance index in low voltage crossing process, the basis of wind power generation set system main control PLC adding and measures PLC.
Wherein, main control PLC controls Wind turbines on the one hand and works accordingly, on the other hand by the communication with current transformer, sends the given instruction of torque etc., and gather current transformer real time data and electric network information, to judge whether electrical network normally runs to current transformer.Measure PLC by network and main control PLC communication, measure the system that PLC is built-in with on-line measurement wind power unit converter performance index.
Shown in Fig. 2, the present invention measures the system of the built-in on-line measurement wind power unit converter performance index of PLC, comprise data acquisition module, data recordin module and index calculate module, the method for corresponding on-line measurement wind power unit converter performance index comprises the following steps:
(1) the low voltage crossing control strategy of master control is revised, shown in accompanying drawing 3, the given given way being revised as step response of the torque after low voltage crossing is terminated.
(2) start Wind turbines, to run and test plan carries out low voltage crossing test according to normal, low wear during the given amplitude of falling of torque be M.
(3) data acquisition module is by the data in network communication Real-time Collection main control PLC, comprising: the low voltage crossing signal LVRT that the given torque Torque_ref of master control, current transformer feedback torque Torque_con and current transformer send.
(4) data of the given torque of master control and current transformer feedback torque are recorded, preferably, when data collecting module collected occurs to low voltage crossing signal LVRT, the given torque Torque_ref of master control starting to record certain time length by this signal trigger data logging modle again and the data of current transformer feedback torque Torque_con, to avoid recording data in a large number for a long time.
(5) index calculate module is according to the data of data recordin module record, according to the step response index definition shown in accompanying drawing 3, with reference to the given torque Torque_ref of master control, calculate the performance index of current transformer step response, comprise t time delay that feedback torque Torque_con responds
d, rise time t
r, and the regulating time t of 2% criterion
s.
By mthods, systems and devices of the present invention, can realize in low voltage crossing process, to the wind power unit converter Key Performance Indicator t that scene is run
d, t
rand t
son-line measurement: by revising the low voltage crossing strategy of primary control program, realize the torque step response test of the wind power unit converter run at the scene; By the method for low voltage crossing signal trigger data record and index computing, provide unattended automatic test approach; Complete test by the test figure of the tested Wind turbines of network collection, greatly reduce the change amount of hardware, make the present invention be easy to realize, be convenient to promote, and extra impact can not be caused on operation Wind turbines.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (5)
1. a method for on-line measurement wind power unit converter performance index, is characterized in that comprising the following steps:
A. the low voltage crossing control strategy of master control is revised, the given given way being revised as step response of the torque after being terminated by low voltage crossing;
B. start Wind turbines, carry out low voltage crossing test;
C. the given torque of master control in Real-time Collection main control PLC and current transformer feedback torque;
D. the data of the given torque of master control and current transformer feedback torque are recorded;
E. the regulating time of the time delay of current transformer feedback torque response, rise time and 2% criterion is calculated.
2. the method for on-line measurement wind power unit converter performance index according to claim 1, is characterized in that:
In described step C, the data of collection also comprise the low voltage crossing signal that current transformer sends;
In described step D, when collecting the generation of low voltage crossing signal, then start the data recording the given torque of master control and current transformer feedback torque.
3. be applied to a system for the on-line measurement wind power unit converter performance index of method described in claim 1 or 2, it is characterized in that comprising:
Data acquisition module, for the given torque of the master control in Real-time Collection main control PLC and current transformer feedback torque data;
Data recordin module, for the data record of the given torque of master control and current transformer feedback torque; And
Index calculate module, for calculating the time delay of current transformer feedback torque response, the regulating time of rise time and 2% criterion.
4. a device for on-line measurement wind power unit converter performance index, is characterized in that comprising:
Send the given instruction of torque to current transformer, and gather the main control PLC of current transformer real time data and electric network information; And
Be connected with main control PLC, and be built-in with the measurement PLC of system described in claim 3.
5. the device of a kind of on-line measurement wind power unit converter performance index according to claim 4, is characterized in that described main control PLC is connected by network communication with measurement PLC.
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| CN201210265627.0A CN102818951B (en) | 2012-07-27 | 2012-07-27 | Method, system and device for measuring performance index of wind power unit converter on line |
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| CN104091501B (en) * | 2012-12-19 | 2016-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Energy based on permanent-magnetic wind driven generator conversion dynamic model experiment platform and test method |
| CN109101008A (en) * | 2017-06-21 | 2018-12-28 | 上海电气风电集团有限公司 | The test method of delay is communicated and responded between main control PLC and current transformer |
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| CN101499664A (en) * | 2008-02-03 | 2009-08-05 | 北京能高自动化技术有限公司 | Low voltage traversing control method for wind power generation set grid-connection current transformer |
| CN102570496A (en) * | 2010-12-08 | 2012-07-11 | 西门子公司 | Fault-ride-through method, converter and power generating unit for a wind turbine |
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