CN105139263A - Wind power station wattless voltage level evaluation method based on WAMS data and system thereof - Google Patents

Abstract

The invention relates to a wind power station wattless voltage level evaluation method based on WAMS data and a system thereof. The method comprises steps that, wide-area monitoring system WAMS data is accessed and parsed; an operation characteristic index system of a wind power station dynamic wattless compensator is established, and evaluation on each index is carried out; comprehensive evaluation is carried out based on wind power station dynamic wattless voltage level according to various index evaluation result. According to the method, based on the wind power operation characteristics, the wind power station wattless voltage level is comprehensively evaluated from multiple aspects of a wind power station wattless operation scope, dynamic wattless response characteristics, wattless compensator switching states, dynamic wattless compensator operation capacities and dynamic wattless supporting capacities, comprehensive evaluation on the wind power station wattless voltage level provides decision support for wind power station operation and management staff, and the wind power station safety operation level is further improved.

Description

A kind of wind power plant reactive voltage level evaluation method based on WAMS data and system thereof

Technical field

The present invention relates to a kind of wind energy turbine set voltage levvl appraisal procedure and system thereof, specifically relate to a kind of wind power plant reactive voltage level evaluation method based on WAMS data and system thereof.

Background technology

Wind-power electricity generation is the regenerative resource of the most ripe, the most Development volue of technology in renewable energy power generation technology.Development wind-power electricity generation, for guarantee energy security, is readjusted the energy structure, is alleviated environmental pollution, realize sustainable development etc. and all have very important significance.Along with large-scale wind power access electrical network, the impact that bring of instability on electric system of its output power is more and more outstanding, and some areas repeatedly occur because voltage fluctuation causes the accident of blower fan off-grid.Assessment for wind power plant reactive voltage under grid disturbance does not have good method at present, and therefore how carrying out analysis and evaluation to wind power plant reactive voltage level is one of problem in the urgent need to research.

At present, wind energy turbine set is mainly by equipment voltage and current change in Real-Time Monitoring wind energy turbine set, and the voltage of reactive-load compensation equipment, electric current, meritorious and idle situation of change of to exert oneself etc., by people for gathering, analyzing these Monitoring Data and curve, analysis and assessment wind power plant reactive voltage level.This method workload is large, is difficult to carry out comprehensive, objective Efficient Evaluation to wind power plant reactive voltage level fast.

Summary of the invention

For solving above-mentioned deficiency of the prior art, the object of this invention is to provide the wind power plant reactive voltage level evaluation method based on WAMS data and system thereof, the present invention utilizes the wind energy turbine set dynamic reactive voltage levvl index of foundation, carries out comprehensively and objectively effectively analysis and evaluation fast to wind power plant reactive voltage level.There is a basic understanding some aspects in order to the embodiment to disclosure, shown below is simple summary.This summarized section is not extensive overview, neither determine key/critical component or describe the protection domain of these embodiments.Its sole purpose presents some concepts by simple form, in this, as the preamble of following detailed description.

The object of the invention is to adopt following technical proposals to realize:

The invention provides a kind of wind power plant reactive voltage level evaluation method based on WAMS data, its improvements are, described method comprises:

Access wide-area monitoring systems WAMS measured data is also resolved;

Set up the index system of wind energy turbine set dynamic reactive compensation device operation characteristic, and index is assessed;

Based on described index evaluation result, comprehensive assessment wind energy turbine set dynamic reactive voltage levvl.

Further, the described index system setting up wind energy turbine set dynamic reactive compensation device operation characteristic, comprising: wind energy turbine set is idle range of operation evaluation index, wind energy turbine set dynamic reactive response characteristic evaluation index, Reactive Compensation in Wind Farm device are thrown and moved back state estimation index, wind energy turbine set dynamic reactive compensation device service ability evaluation index and wind energy turbine set dynamic reactive supporting capacity evaluation index;

To the assessment of described index, comprising:

The idle range of operation of assessment wind energy turbine set;

Assessment wind energy turbine set dynamic reactive Analysis of response;

Assessment wind energy turbine set dynamic reactive compensation device is thrown and is moved back state;

Assessment wind energy turbine set dynamic reactive compensation device service ability;

Assessment wind energy turbine set dynamic reactive supporting capacity.

Further, the idle range of operation of described assessment wind energy turbine set, comprising:

Obtain the reactive power of real-time dynamic reactive compensation device, and pre-service is carried out to data, reject bad wind power data;

Judge that whether reactive power is higher than idle higher limit, then think that dynamic reactive compensation device reactive power gets over the upper limit;

Judge that whether reactive power is lower than idle lower limit, then think that dynamic reactive compensation device reactive power gets over lower limit;

Store reactive power constraints record as assessment foundation;

Idle operating index is calculated as follows shown in formula (1), and using reactive power constraints number of times A as ordinate, the duration, t was as horizontal ordinate, and curve plotting also carries out integration to curve:

Y＝∫Adt(1)；

Interval for desired value being converted 0-100, by (2) calculating according to the following formula of all wind energy turbine set desired values of some day:

${Y_i}^{\′}=100-\frac{Y_i}{\sqrt{\underset{i=1}{\overset{m}{\mathrm{\Σ}}}{Y_i}^2}}\×100,i=\mathrm{1,2}...m---\left(2\right);$

Wherein: m represents the total number of wind energy turbine set, Y _irepresent i-th out-of-limit index of the idle operation of wind energy turbine set; Y _i' represent i-th out-of-limit desired value of the idle operation of wind energy turbine set of some day.

Further, described assessment wind energy turbine set dynamic reactive response characteristic, comprising:

Obtain real-time grid-connected point voltage value, and pre-service is carried out to data;

If judged lower than standard value, then detect dynamic reactive compensation device SVG reactive power and current information, and pre-service is carried out to data;

When detecting that dynamic reactive compensation device SVG reactive power presents ascendant trend, then think that dynamic reactive compensation device SVG has started response, detect dynamic reactive compensation device SVG electric current return to voltage out-of-limit before 90% and up and down fluctuation when being no more than 10%, then think that dynamic reactive compensation device SVG regulates end;

Record starts the response time and regulates the end time, calculates response time, duration and dynamic reactive compensation device SVG current overshoot amount; Difference when described dynamic reactive compensation device SVG current overshoot amount refers to before dynamic reactive compensation device SVG current maxima and Voltage Drop;

The dynamic reactive compensation device SVG duration is as shown in the formula shown in (3):

Δ T _duration=T _{end time}– T _{response time}(3);

In formula, Δ T _duration---the dynamic reactive compensation device SVG duration;

T _{end time}---the dynamic reactive compensation device SVG end time;

T _{response time}---the dynamic reactive compensation device SVG response time;

Dynamic reactive compensation device SVG current overshoot amount is as shown in the formula shown in (4):

Δ I _{current overshoot amount}=I _{current maxima}– I _{fall front current value}(4);

In formula, Δ I _{current overshoot amount}---dynamic reactive compensation device SVG current overshoot amount;

I _{current maxima}---dynamic reactive compensation device SVG current maxima;

I _{fall front current value}---dynamic reactive compensation device SVG falls front current value.

Further, described assessment Reactive Compensation in Wind Farm device is thrown and is moved back state, comprising:

Obtain the switching value information of dynamic reactive compensation device, and pre-service is carried out to data;

If wind energy turbine set dynamic reactive compensation device SVG switching value is off state, then think that dynamic reactive compensation device SVG is in off-duty state, by the state of dynamic reactive compensation device SVG stored in database

If dynamic reactive compensation device SVG switching value closes, then think that dynamic reactive compensation device SVG is in running status, by the state of dynamic reactive compensation device SVG stored in database;

The disconnection of statistics section dynamic reactive compensation device seclected time and closed ratio, determine the operational percentage information of wind energy turbine set dynamic reactive compensation device SVG:

S _{operational percentage}=T _{closure time}/ (T _{closure time}+ T _{trip time}) (5);

In formula, S _{operational percentage}---dynamic reactive compensation device SVG operational percentage;

T _{closure time}---dynamic reactive compensation device SVG closure time;

T _{trip time}---dynamic reactive compensation device SVG trip time.

Further, described assessment wind energy turbine set dynamic reactive compensation device service ability, comprising:

Current value before the switching value information of acquisition dynamic reactive compensation device SVG and dynamic reactive compensation device SVG disconnect, and pre-service is carried out to data;

Judge whether dynamic reactive compensation device SVG disconnects, obtain the electric current before dynamic reactive compensation device SVG disconnection, when electric current is less than 10A, ignore dynamic reactive compensation device SVG; When being greater than 10A, the voltage condition of 5min before judging;

Judge whether dynamic reactive compensation device SVG meets according to the situation of voltage to require working time: 0.2≤u≤0.9 is no less than the low-voltage duration, 0.9<u≤1.1 are continuous, 1.1<u≤1.15 have continuous 5min ability, 1.15<u≤1.2 have runs 1min ability continuously, and 1.2<u is out of service;

Store relevant state data as assessment foundation;

Wherein: the unit of wind energy turbine set voltage levvl u is perunit value.

Further, described assessment wind energy turbine set dynamic reactive supporting capacity, comprising:

Obtain real-time grid-connected point voltage value, and pre-service is carried out to data;

If when 20% ~ 90% interval judging to be in nominal voltage is interior, wind energy turbine set can support voltage resume by injecting reactive current; Detect the current value of reactive power compensator SVG, if I _t>=1.5* (0.9-U _t) I _n, 0.2≤U _twhen≤0.9, be then judged as dynamic reactive compensation device SVG injecting reactive current support voltage resume, and calculate reactive power compensator SVG response time T _swith continuous working period T _c;

Calculate from the moment that grid-connected point voltage falls appearance, if the response time of dynamic reactive Current Control is not more than 75ms, the duration is no less than 550ms, then think that dynamic reactive compensation device has reactive power support ability.

Further, describedly based on indices assessment result, comprehensive assessment is carried out to wind energy turbine set dynamic reactive voltage levvl, comprising:

According to wind energy turbine set dynamic reactive compensation device operation characteristic index, wide-area monitoring systems WAMS measured data is utilized to carry out analysis and evaluation, statistical study is carried out to single wind energy turbine set, wind farm group and the whole network wind energy turbine set dynamic reactive voltage levvl indices, wind energy turbine set dynamic reactive voltage levvl comprehensive assessment index is set up based on indices assessment result, carry out comprehensive assessment based on comprehensive assessment index to wind energy turbine set dynamic reactive voltage levvl, final assessment result sorts in centesimal mode.

The present invention also provides a kind of evaluating system of the wind power plant reactive voltage level evaluation method based on WAMS data, and its improvements are, described system comprises:

For resolving the wide-area monitoring systems WAMS data access module of PMU data and telecontrol communication device data;

Wind energy turbine set for assessment of the idle range of operation of wind energy turbine set is idle range of operation evaluation module;

For assessment of the wind energy turbine set reactive response characteristic evaluation module of wind energy turbine set reactive response characteristic;

Wind energy turbine set dynamic reactive compensation device is thrown and is moved back state estimation module: throw for assessment of wind energy turbine set dynamic reactive compensation device and move back state;

For assessment of the wind energy turbine set dynamic reactive compensation device service ability evaluation module of wind energy turbine set dynamic reactive compensation device service ability;

For assessment of the wind energy turbine set dynamic reactive supporting capacity evaluation module of wind energy turbine set dynamic reactive supporting capacity;

Data display module: for showing that dynamic reactive compensation device range of operation Real-Time Monitoring, dynamic reactive compensation device response performance, wind energy turbine set Reactive Power Device drop into state, dynamic reactive compensation device service ability and dynamic reactive compensation device service ability interface;

For showing the dynamic reactive compensation device response events of wind energy turbine set or the whole network in certain wind energy turbine set in section seclected time, region, dynamic queries is idle variable capacity, current overshoot amount, response time, high/low voltage ride-through whether mated condition;

For showing the whole network or the out-of-limit situation of regional dynamics reactive power compensator, real-time online monitors that wind energy turbine set dynamic reactive compensation device drops into the situation of state, dynamic reactive compensation device service ability and dynamic reactive compensation device service ability.

Compared with immediate prior art, the excellent effect that technical scheme provided by the invention has is:

(1) the wind power plant reactive voltage level evaluation method based on WAMS data provided by the invention, WAMS measured data is utilized to assess wind power plant reactive voltage level, bad data is rejected to the pre-service of WAMS data, mapped by network topology, be the data model that system can identify by PMU data, AGC/AVC data transformations, by data model, indices assessed.Extract wind power plant reactive voltage proficiency assessment index system, mainly comprise the idle range of operation assessment of wind energy turbine set, the assessment of dynamic reactive response characteristic, reactive power compensator drops into state estimation, dynamic reactive compensation device service ability assesses and dynamic reactive supporting capacity is assessed; Set up wind power plant reactive voltage level comprehensive evaluation index based on indices assessment result, realize the objective comprehensive assessment of the dynamic reactive voltage levvl to wind energy turbine set.

(2) the present invention builds wind power plant reactive voltage proficiency assessment analytic system, be conducive to dispatching of power netwoks operations staff and thoroughly evaluating is carried out to the idle operation conditions of wind energy turbine set and voltage levvl, wind energy turbine set dynamic reactive voltage levvl comprehensive assessment result, can provide decision support for wind energy turbine set operational management.By integrating power grid wind real time data and non-real-time data, quantitative analysis wind energy turbine set dynamic reactive voltage evaluation index, comprehensive quantitative analysis can be carried out to the idle index within the scope of random time, contribute to comprehensive assurance of wind power plant reactive voltage level and the safety operation level of electrical network under improving large-scale wind power access conditions.

In order to above-mentioned and relevant object, will describe in detail and the feature particularly pointed out in the claims after one or more embodiment comprises.Explanation below and accompanying drawing describe some illustrative aspects in detail, and its instruction is only some modes in the utilizable various mode of principle of each embodiment.Other benefit and novel features become obvious by considering by reference to the accompanying drawings along with detailed description below, and the disclosed embodiments will comprise all these aspects and theirs is equivalent.

Accompanying drawing explanation

Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the process flow diagram based on the wind power plant reactive voltage level evaluation method of WAMS data in the embodiment of the present invention;

Fig. 2 is the functional block diagram based on the wind power plant reactive voltage proficiency assessment system of WAMS data in the embodiment of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.

The following description and drawings illustrate specific embodiment of the invention scheme fully, to enable those skilled in the art to put into practice them.Other embodiments can comprise structure, logic, electric, process and other change.Embodiment only represents possible change.Unless explicitly requested, otherwise independent assembly and function are optional, and the order of operation can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The scope of embodiment of the present invention comprises the gamut of claims, and all obtainable equivalent of claims.In this article, these embodiments of the present invention can be represented with term " invention " individually or always, this is only used to conveniently, and if in fact disclose the invention more than, be not the scope that automatically will limit this application is any single invention or inventive concept.

The wind energy turbine set dynamic reactive voltage levvl index utilizing foundation of the present invention, carries out comprehensively objectively analysis and evaluation to wind power plant reactive voltage level.Utilize WAMS measured data, require to realize throwing to the idle range of operation of wind energy turbine set, dynamic reactive response characteristic, reactive power compensator the analysis and evaluation moving back situation, dynamic reactive compensation device runnability and dynamic reactive supporting capacity index etc. according to wind power plant reactive voltage, carry out comprehensive assessment based on the dynamic reactive voltage levvl of indices assessment result to wind energy turbine set.

As shown in Figure 1, Fig. 1 is the process flow diagram based on the wind power plant reactive voltage level evaluation method of WAMS data in the embodiment of the present invention, comprising:

Step1: access wide-area monitoring systems WAMS measured data is also resolved;

Step2: the index system establishing reflection wind-powered electricity generation dynamic reactive compensation device operation characteristic, mainly comprises the idle range of operation evaluation of wind energy turbine set, dynamic reactive response characteristic is evaluated, reactive power compensator drops into the indexs such as state evaluation, the evaluation of dynamic reactive compensation device service ability and the evaluation of dynamic reactive supporting capacity.

The idle range of operation of assessment wind energy turbine set;

By Real-time Obtaining dynamic reactive compensation device SVG current without work value, the perceptual reactive limit value of contrast dynamic reactive compensation device SVG and capacitive reactive power limit value, realize the monitoring analysis to wind energy turbine set dynamic reactive range of operation.Wind energy turbine set dynamic reactive compensation device SVG perception reactive limit value is greater than without work value if current, then think that dynamic reactive compensation device SVG is idle and get over the upper limit, capacitive reactive power limit value is less than without work value if current, then think that current dynamic reactive compensation device SVG is idle and get over lower limit, preserve relevant reactive power constraints data and assess foundation as reactive power constraints.

The out-of-limit index calculate of idle operation is shown below, and using reactive power constraints number of times A as ordinate, the duration, t was as horizontal ordinate, and curve plotting also carries out integration to curve.

Y＝∫Adt(1)；

Interval in order to desired value being converted 0-100, all wind energy turbine set desired values of some day calculated according to the following formula, wind energy turbine set amounts to m.

${Y_i}^{\&prime;}=100-\frac{Y_i}{\sqrt{\underset{i=1}{\overset{m}{\mathrm{\&Sigma;}}}{Y_i}^2}}\&times;100,i=\mathrm{1,2}...m---\left(2\right);$

Assessment wind energy turbine set dynamic reactive Analysis of response;

Different according to its characteristic according to the reactive power source in wind energy turbine set, response time requirement is: the shunt reactor/capacitor of wind energy turbine set configuration, the response time of voltage regulating imaginary power compensation system should be not more than 2s; The response time of Wind turbines should be not more than 80ms; The response time of the dynamic reactive compensation device dynamic adjustments of wind energy turbine set configuration is not more than 30ms.Wind energy turbine set should guarantee that in field, the dynamic part of reactive power compensator regulates automatically, guarantees that capacitor, Reactor Branch in case of emergency can by quick correct switchings.

The real-time adjustment number of times of dynamic reactive compensation device after change in voltage is added up, and the number of times that dynamic reactive compensation device after change in voltage is not made adjustment in real time is added up, calculate its correct responsiveness.According to the device institute output reactive power of the capacity of reactive power compensator each in wind energy turbine set, switching value information and collection, analyze the variable capacity determining corresponding reactive power compensator, and then the assessment to the adjustable nargin of whole wind power plant reactive power can be realized.

When wind farm grid-connected point voltage occurring and falling, according to the dynamic reactive compensation device SVG reactive power acquired and current information, the variation tendency of monitoring dynamic reactive compensation device SVG reactive power.When detecting that dynamic reactive compensation device SVG reactive power presents ascendant trend, then judge that SVG has started response, detect dynamic reactive compensation device SVG electric current return to voltage out-of-limit before 90% and fluctuation when being no more than 10% up and down, then judge that dynamic reactive compensation device SVG regulates end, record the current end time, calculate response time, duration and dynamic reactive compensation device SVG current overshoot amount (difference time before dynamic reactive compensation device SVG current maxima and Voltage Drop).

The SVG duration is calculated as follows:

Δ T _duration=T _{end time}– T _{response time}(3);

In formula, Δ T _duration---the SVG duration;

T _{end time}---the SVG end time;

T _{response time}---the SVG response time.

SVG current overshoot amount is calculated as follows:

Δ I _{current overshoot amount}=I _{current maxima}– I _{fall front current value}(4);

In formula, Δ I _{current overshoot amount}---SVG current overshoot amount;

I _{current maxima}---SVG current maxima;

I _{fall front current value}---SVG falls front current value.

Assessment wind energy turbine set dynamic reactive compensation device is thrown and is moved back state;

By Real-Time Monitoring remote signalling amount, obtain the on-off state of each wind energy turbine set SVG, if wind energy turbine set SVG switching value is off, then think that this SVG is in off-duty state, by the state of this SVG stored in database, if this SVG switching value closes, then think that this SVG is in running status, by the state of this SVG stored in database, the ratio of the SVG closed and disconnected of inquiry section seclected time calculates SVG operational percentage:

S _{operational percentage}=T _{closure time}/ (T _{closure time}+ T _{trip time}) (5);

In formula, S _{operational percentage}---SVG operational percentage;

T _{closure time}---SVG closure time;

T _{trip time}---SVG trip time.

Assessment wind energy turbine set dynamic reactive compensation device service ability;

Calculate the perunit value of wind farm grid-connected point voltage collection capacity, the runnability of variation range to shunt reactor group, dynamic reactive compensation device (SVC/SVG) according to grid-connected point voltage is made an appraisal.According to dynamic reactive compensation device requirement working time under different voltage levvl of relevant regulations reactive power compensator service requirement.Judge and site power frequency positive sequence voltage value 0.2≤U _t≤ 0.9 is no less than the low-voltage duration, 0.9<U _t≤ 1.1 run continuously, 1.1<U _t≤ 1.15 have continuous 5min ability, 1.15<U _t≤ 1.2 have operation 1min ability continuously, and 1.2<u is out of service.

Utilize the grid-connected point voltage perunit value size calculated, and the grid-connected point voltage obtained by analysis raises or falls the moment, whether again by analyzing the information such as switching value of reactive power compensator, can analyze the continuous working period of dynamic reactive compensation device (SVC/SVG) after change in voltage meets regulatory requirements.

According to Real-Time Monitoring switching value information, get the switching value information of each wind energy turbine set SVG, when monitoring SVG tripping, analyze the electric current before SVG disconnection, when being greater than 10A, judge front 5min and the voltage levvl of site, and judge whether SVG meets the requirements as follows working time according to voltage levvl:

0.2≤u≤0.9 is no less than the low-voltage duration;

0.9<u≤1.1 are run continuously;

1.1<u≤1.15 have continuous 5min ability;

1.15<u≤1.2 have runs 1min ability continuously;

1.2<u out of service.

Assessment wind energy turbine set dynamic reactive supporting capacity;

In " wind energy turbine set access power system technology specify " for total installation of generating capacity at million kilowatt scale and above wind farm group, when electric system generation three phase short circuit fault causes Voltage Drop, each wind energy turbine set should have following dynamic reactive supporting capacity in low voltage crossing process.

Wind energy turbine set injects the dynamic reactive electric current of electric system:

I _T≥1.5*(0.9-U _t)I _n,(0.2≤. _t≤0.9)(6)；

In formula, U _t---wind farm grid-connected point voltage perunit value,

I _n---wind energy turbine set rated current.

The grid-connected point voltage information of Real-Time Monitoring, when voltage be in nominal voltage 20% ~ 90% interval in time, the current value of detection SVG, if I _t>=1.5* (0.9-U _t) I _n, (0.2≤U _t≤ 0.9) time, then think and calculate SVG response time and continuous working period by SVG injecting reactive current support voltage resume.

Step3: comprehensive assessment is carried out to wind energy turbine set dynamic reactive voltage levvl based on indices assessment result:

According to wind energy turbine set dynamic reactive compensation device operation characteristic index, WAMS measured data is utilized to carry out analysis and evaluation, statistical study is carried out to single wind energy turbine set, wind farm group and the whole network wind energy turbine set dynamic reactive voltage levvl indices, wind energy turbine set dynamic reactive voltage levvl comprehensive assessment index is set up based on indices assessment result, final assessment result is carried out sort (the higher Evaluated effect of percentage is unreasonable to be thought) in centesimal mode, can provide technical basis for improving the new forms of energy safe operation management levels such as wind-powered electricity generation.

As shown in Figure 2, Fig. 2 is the functional block diagram based on the wind power plant reactive voltage proficiency assessment system of WAMS data in the embodiment of the present invention, comprising:

1) wide-area monitoring systems WAMS data access module: for resolving PMU data and telecontrol communication device data;

2) wind energy turbine set idle range of operation evaluation module: for assessment of the idle range of operation of wind energy turbine set; Its workflow comprises:

STEP1: the reactive power obtaining one second dynamic reactive responding device, and pre-service is carried out to data, reject bad wind power data;

STEP2: judge that whether reactive power is higher than idle higher limit, then think that dynamic reactive responding device reactive power gets over the upper limit;

STEP3: judge that whether reactive power is lower than idle lower limit, then think that dynamic reactive responding device reactive power gets over lower limit;

STEP4: store reactive power constraints record as assessment foundation.

3) wind energy turbine set reactive response characteristic evaluation module: for assessment of wind energy turbine set reactive response characteristic; Its workflow comprises:

STEP1: obtain one second grid-connected point voltage value, and pre-service is carried out to data;

STEP2: if judged lower than standard value, then detect SVG reactive power and current information, and pre-service is carried out to data;

STEP3: when detecting that SVG reactive power presents ascendant trend, then think that SVG has started response, detect SVG electric current return to voltage out-of-limit before 90% and up and down fluctuation when being no more than 10%, then think that SVG regulates end.

STEP4: record starts the response time and regulates the end time, calculates the response time.

4) wind energy turbine set dynamic reactive compensation device is thrown and is moved back state estimation module: throw for assessment of wind energy turbine set dynamic reactive compensation device and move back state; Its workflow comprises:

STEP1: the switching value information obtaining dynamic reactive responding device, and pre-service is carried out to data;

STEP2: judge that dynamic reactive responding device is off state, and upper one second is closure state, then think that dynamic reactive responding device disconnected from this second;

STEP3: add up the disconnection of dynamic reactive responding device among a day and closed ratio, then can calculate the operational percentage information of wind energy turbine set dynamic reactive responding device.

5) wind energy turbine set dynamic reactive compensation device service ability evaluation module: for assessment of wind energy turbine set dynamic reactive compensation device service ability; Its workflow comprises:

STEP1: the current value before the switching value information of acquisition SVG and SVG disconnect, and pre-service is carried out to data;

STEP2: judge whether SVG disconnects, obtains the electric current before SVG disconnection, when electric current is less than 10A, ignores this SVG, when being greater than 10A, and the voltage condition of 5min before judging;

STEP3: judge whether SVG meets according to the situation of voltage and require working time: 0.2≤u≤0.9 is no less than the low-voltage duration, 0.9<u≤1.1 are continuous, 1.1<u≤1.15 have continuous 5min ability, 1.15<u≤1.2 have runs 1min ability continuously, and 1.2<u is out of service;

STEP4: store relevant state data as assessment foundation.

6) wind energy turbine set dynamic reactive supporting capacity evaluation module: for assessment of wind energy turbine set dynamic reactive supporting capacity; Its workflow comprises:

STEP1: obtain one second grid-connected point voltage value, and pre-service is carried out to data;

STEP2: if when 20% ~ 90% interval judging to be in nominal voltage is interior, wind energy turbine set should be able to support voltage resume by injecting reactive current;

STEP3: calculate fall appearance from grid-connected point voltage moment, if the response time of dynamic reactive Current Control is not more than 75ms, the duration is no less than 550ms, then think that this dynamic reactive compensation device has reactive power support ability.

7) data display module: for showing that dynamic reactive compensation device range of operation Real-Time Monitoring, dynamic reactive compensation device response performance, wind energy turbine set Reactive Power Device drop into state, dynamic reactive compensation device service ability and dynamic reactive compensation device service ability interface;

For showing the dynamic reactive compensation device response events of wind energy turbine set or the whole network in certain wind energy turbine set in section seclected time, region, dynamic queries is idle variable capacity, current overshoot amount, response time, high/low voltage ride-through whether mated condition;

For showing the whole network or the out-of-limit situation of regional dynamics reactive power compensator, real-time online monitors that wind energy turbine set dynamic reactive compensation device drops into the situation of state, dynamic reactive compensation device service ability and dynamic reactive compensation device service ability.

The present invention is directed to wind-powered electricity generation operation characteristic, state, dynamic reactive compensation device service ability and dynamic reactive supporting capacity many aspects comprehensive assessment wind power plant reactive voltage level is dropped into from the idle range of operation of wind energy turbine set, dynamic reactive response characteristic, reactive power compensator, objective wind power plant reactive voltage level of assessing all sidedly provides decision support to wind energy turbine set operational management personnel, improves the safety operation level of wind energy turbine set further.

Unless otherwise specific statement, term such as processes, calculate, computing, determine, to show etc. action and/or the process that can refer to one or more process or computing system or similar devices, the data manipulation that the physics (as electronics) be expressed as in the register of disposal system or storer is measured by described action and/or process and be converted into that the storer, register or other this type of informations that are expressed as disposal system similarly store, other data of physical quantity in transmitting or display device.Information and signal can use any one in multiple different techniques and methods to represent.Such as, the data mentioned in the description on run through, instruction, order, information, signal, bit, symbol and chip can represent with voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its combination in any.

The particular order of the step in process disclosed by the invention or level are the examples of illustrative methods.Based on design preference, should be appreciated that, the particular order of the step in process or level can be rearranged when not departing from protection domain of the present disclosure.Appended claim to a method gives the key element of various step with exemplary order, and is not to be limited to described particular order or level.

In above-mentioned detailed description, various feature is combined in single embodiment together, to simplify the disclosure.This open method should be interpreted as reflecting such intention, that is, the embodiment of theme required for protection needs the more feature of feature clearly stated in each claim.On the contrary, as appending claims reflect, the present invention is in the state fewer than whole features of disclosed single embodiment.Therefore, appending claims is clearly merged in detailed description hereby, and wherein every claim is alone as the preferred embodiment that the present invention is independent.

Those skilled in the art it is also understood that various illustrative box, module, circuit and the algorithm steps combining embodiment herein and describe all can be embodied as electronic hardware, computer software or its combination.In order to the interchangeability between hardware and software is clearly described, all carry out usually describing around its function to various illustrative parts, frame, module, circuit and step above.Be embodied as hardware as this function or be embodied as software, the design constraint depending on specific application and whole system is applied.Those skilled in the art for each application-specific, can realize described function in the mode of accommodation, but, thisly realize decision-making and should not be construed as and deviate from protection domain of the present disclosure.

Description above comprises the citing of one or more embodiment.Certainly, all possible combination describing parts or method in order to describe above-described embodiment is impossible, but those of ordinary skill in the art should be realized that, each embodiment can do further combinations and permutations.Therefore, embodiment described herein is intended to contain all such changes, modifications and variations fallen in the protection domain of appended claims.In addition, " comprise " with regard to the term used in instructions or claims, the mode that contains of this word is similar to term and " comprises ", just as " comprising, " be in the claims used as link word explain such.In addition, be used in any one term in the instructions of claims " or " be to represent " non-exclusionism or ".

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although with reference to above-described embodiment to invention has been detailed description; those of ordinary skill in the field still can modify to the specific embodiment of the present invention or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.

Claims (9)

1. based on a wind power plant reactive voltage level evaluation method for WAMS data, it is characterized in that, described method comprises:

Access wide-area monitoring systems WAMS measured data is also resolved;

Set up the index system of wind energy turbine set dynamic reactive compensation device operation characteristic, and index is assessed;

Based on described index evaluation result, comprehensive assessment wind energy turbine set dynamic reactive voltage levvl.

2. appraisal procedure as claimed in claim 1, it is characterized in that, the described index system setting up wind energy turbine set dynamic reactive compensation device operation characteristic, comprising: wind energy turbine set is idle range of operation evaluation index, wind energy turbine set dynamic reactive response characteristic evaluation index, Reactive Compensation in Wind Farm device are thrown and moved back state estimation index, wind energy turbine set dynamic reactive compensation device service ability evaluation index and wind energy turbine set dynamic reactive supporting capacity evaluation index;

The assessment of described index is comprised:

The idle range of operation of assessment wind energy turbine set;

Assessment wind energy turbine set dynamic reactive Analysis of response;

Assessment wind energy turbine set dynamic reactive compensation device is thrown and is moved back state;

Assessment wind energy turbine set dynamic reactive compensation device service ability;

Assessment wind energy turbine set dynamic reactive supporting capacity.

3. appraisal procedure as claimed in claim 2, it is characterized in that, the idle range of operation of described assessment wind energy turbine set, comprising:

Obtain the reactive power of real-time dynamic reactive compensation device, and pre-service is carried out to data, reject bad wind power data;

Judge that whether reactive power is higher than idle higher limit, then think that dynamic reactive compensation device reactive power gets over the upper limit;

Judge that whether reactive power is lower than idle lower limit, then think that dynamic reactive compensation device reactive power gets over lower limit;

Store reactive power constraints record as assessment foundation;

Idle operating index is calculated as follows shown in formula (1), and using reactive power constraints number of times A as ordinate, the duration, t was as horizontal ordinate, and curve plotting also carries out integration to curve:

Y＝∫Adt(1)；

Interval for desired value being converted 0-100, by (2) calculating according to the following formula of all wind energy turbine set desired values of some day:

${Y_i}^{\&prime;}=100-\frac{Y_i}{\sqrt{\underset{i=1}{\overset{m}{\mathrm{\&Sigma;}}}{Y_i}^2}}\&times;100,i=\mathrm{1,2}...m---\left(2\right);$

Wherein: m represents the total number of wind energy turbine set, Y _irepresent i-th out-of-limit index of the idle operation of wind energy turbine set; Y _i' represent i-th out-of-limit desired value of the idle operation of wind energy turbine set of some day.

4. appraisal procedure as claimed in claim 2, it is characterized in that, described assessment wind energy turbine set dynamic reactive response characteristic, comprising:

Obtain real-time grid-connected point voltage value, and pre-service is carried out to data;

If judged lower than standard value, then detect dynamic reactive compensation device SVG reactive power and current information, and pre-service is carried out to data;

When detecting that dynamic reactive compensation device SVG reactive power presents ascendant trend, then think that dynamic reactive compensation device SVG has started response, detect dynamic reactive compensation device SVG electric current return to voltage out-of-limit before 90% and up and down fluctuation when being no more than 10%, then think that dynamic reactive compensation device SVG regulates end;

Record starts the response time and regulates the end time, calculates response time, duration and dynamic reactive compensation device SVG current overshoot amount; Difference when described dynamic reactive compensation device SVG current overshoot amount refers to before dynamic reactive compensation device SVG current maxima and Voltage Drop;

The dynamic reactive compensation device SVG duration is as shown in the formula shown in (3):

Δ T _duration=T _{end time}– T _{response time}(3);

In formula, Δ T _duration---the dynamic reactive compensation device SVG duration;

T _{end time}---the dynamic reactive compensation device SVG end time;

T _{response time}---the dynamic reactive compensation device SVG response time;

Dynamic reactive compensation device SVG current overshoot amount is as shown in the formula shown in (4):

Δ I _{current overshoot amount}=I _{current maxima}– I _{fall front current value}(4);

In formula, Δ I _{current overshoot amount}---dynamic reactive compensation device SVG current overshoot amount;

I _{current maxima}---dynamic reactive compensation device SVG current maxima;

I _{fall front current value}---dynamic reactive compensation device SVG falls front current value.

5. appraisal procedure as claimed in claim 2, is characterized in that, described assessment Reactive Compensation in Wind Farm device is thrown and moved back state, comprising:

Obtain the switching value information of dynamic reactive compensation device, and pre-service is carried out to data;

If wind energy turbine set dynamic reactive compensation device SVG switching value is off state, then think that dynamic reactive compensation device SVG is in off-duty state, by the state of dynamic reactive compensation device SVG stored in database

If dynamic reactive compensation device SVG switching value closes, then think that dynamic reactive compensation device SVG is in running status, by the state of dynamic reactive compensation device SVG stored in database;

The disconnection of statistics section dynamic reactive compensation device seclected time and closed ratio, determine the operational percentage information of wind energy turbine set dynamic reactive compensation device SVG:

S _{operational percentage}=T _{closure time}/ (T _{closure time}+ T _{trip time}) (5);

In formula, S _{operational percentage}---dynamic reactive compensation device SVG operational percentage;

T _{closure time}---dynamic reactive compensation device SVG closure time;

T _{trip time}---dynamic reactive compensation device SVG trip time.

6. appraisal procedure as claimed in claim 2, it is characterized in that, described assessment wind energy turbine set dynamic reactive compensation device service ability, comprising:

Current value before the switching value information of acquisition dynamic reactive compensation device SVG and dynamic reactive compensation device SVG disconnect, and pre-service is carried out to data;

Judge whether dynamic reactive compensation device SVG disconnects, obtain the electric current before dynamic reactive compensation device SVG disconnection, when electric current is less than 10A, ignore dynamic reactive compensation device SVG; When being greater than 10A, the voltage condition of 5min before judging;

Judge whether dynamic reactive compensation device SVG meets according to the situation of voltage to require working time: 0.2≤u≤0.9 is no less than the low-voltage duration, 0.9<u≤1.1 are continuous, 1.1<u≤1.15 have continuous 5min ability, 1.15<u≤1.2 have runs 1min ability continuously, and 1.2<u is out of service;

Store relevant state data as assessment foundation;

Wherein: the unit of wind energy turbine set voltage levvl u is perunit value.

7. appraisal procedure as claimed in claim 2, it is characterized in that, described assessment wind energy turbine set dynamic reactive supporting capacity, comprising:

Obtain real-time grid-connected point voltage value, and pre-service is carried out to data;

If when 20% ~ 90% interval judging to be in nominal voltage is interior, wind energy turbine set can support voltage resume by injecting reactive current; Detect the current value of reactive power compensator SVG, if I _t>=1.5* (0.9-U _t) I _n, 0.2≤U _twhen≤0.9, be then judged as dynamic reactive compensation device SVG injecting reactive current support voltage resume, and calculate reactive power compensator SVG response time T _swith continuous working period T _c;

Calculate from the moment that grid-connected point voltage falls appearance, if the response time of dynamic reactive Current Control is not more than 75ms, the duration is no less than 550ms, then think that dynamic reactive compensation device has reactive power support ability.

8. appraisal procedure as claimed in claim 2, is characterized in that, describedly carries out comprehensive assessment based on indices assessment result to wind energy turbine set dynamic reactive voltage levvl, comprising:

According to wind energy turbine set dynamic reactive compensation device operation characteristic index, wide-area monitoring systems WAMS measured data is utilized to carry out analysis and evaluation, statistical study is carried out to single wind energy turbine set, wind farm group and the whole network wind energy turbine set dynamic reactive voltage levvl indices, wind energy turbine set dynamic reactive voltage levvl comprehensive assessment index is set up based on indices assessment result, carry out comprehensive assessment based on comprehensive assessment index to wind energy turbine set dynamic reactive voltage levvl, final assessment result sorts in centesimal mode.

9. an evaluating system for the wind power plant reactive voltage level evaluation method based on WAMS data according to any one of claim 1-8, it is characterized in that, described system comprises:

For resolving the wide-area monitoring systems WAMS data access module of PMU data and telecontrol communication device data;

Wind energy turbine set for assessment of the idle range of operation of wind energy turbine set is idle range of operation evaluation module;

For assessment of the wind energy turbine set reactive response characteristic evaluation module of wind energy turbine set reactive response characteristic;

Wind energy turbine set dynamic reactive compensation device is thrown and is moved back state estimation module: throw for assessment of wind energy turbine set dynamic reactive compensation device and move back state;

For assessment of the wind energy turbine set dynamic reactive compensation device service ability evaluation module of wind energy turbine set dynamic reactive compensation device service ability;

For assessment of the wind energy turbine set dynamic reactive supporting capacity evaluation module of wind energy turbine set dynamic reactive supporting capacity;

Data display module: for showing that dynamic reactive compensation device range of operation Real-Time Monitoring, dynamic reactive compensation device response performance, wind energy turbine set Reactive Power Device drop into state, dynamic reactive compensation device service ability and dynamic reactive compensation device service ability interface;

For showing the dynamic reactive compensation device response events of wind energy turbine set or the whole network in certain wind energy turbine set in section seclected time, region, dynamic queries is idle variable capacity, current overshoot amount, response time, high/low voltage ride-through whether mated condition;

For showing the whole network or the out-of-limit situation of regional dynamics reactive power compensator, real-time online monitors that wind energy turbine set dynamic reactive compensation device drops into the situation of state, dynamic reactive compensation device service ability and dynamic reactive compensation device service ability.