CN106856331A - A kind of grid-connected performance test methods of wind-light combined power generation system - Google Patents

A kind of grid-connected performance test methods of wind-light combined power generation system Download PDF

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Publication number
CN106856331A
CN106856331A CN201510907106.4A CN201510907106A CN106856331A CN 106856331 A CN106856331 A CN 106856331A CN 201510907106 A CN201510907106 A CN 201510907106A CN 106856331 A CN106856331 A CN 106856331A
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China
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wind
power
grid
photovoltaic
generation
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CN201510907106.4A
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Chinese (zh)
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CN106856331B (en
Inventor
杜慧成
王瑞明
陈晨
李少林
孙勇
张金平
谢健
张宗岩
高永恒
于雪松
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中国电力科学研究院
国家电网公司
中电赛普检验认证(北京)有限公司
中电普瑞张北风电研究检测有限公司
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Priority to CN201510907106.4A priority Critical patent/CN106856331B/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/386Wind energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects

Abstract

The present invention relates to a kind of grid-connected performance test methods of wind-light combined power generation system, comprise the steps:Step 1:Determine the test point of wind-light combined power generation system Site Detection;Step 2:Determine the test condition of wind-light combined power generation system Site Detection;Step 3:Determine the test content of wind-light combined power generation system Site Detection;Step 4:Test the grid entry point performance of wind-light combined power generation system.The technical scheme that the present invention is provided solves the problems, such as the grid-connected performance Site Detection of the electricity generation system, and the normalization and accuracy tool to improving wind-powered electricity generation combined generating system on-the-spot test are of great significance.

Description

A kind of grid-connected performance test methods of wind-light combined power generation system

Technical field

The method of testing with control is accessed the present invention relates to a kind of new energy, and in particular to a kind of grid-connected property of wind-light combined power generation system Can method of testing.

Background technology

Wind-light combined power generation system is comprehensive utilization wind energy, the wind and light complementary power supply system of luminous energy, is a kind of rational power-supply system. It is not only to solve current energy crisis and problem of environmental pollution opens a Tiao Xin roads, and effectively increases wind-powered electricity generation and photovoltaic hair To the stability of a system and reliability during electric individually output power.

Single solar energy or wind energy system, due to being constrained by time and region, it is difficult to round-the-clock utilization solar energy and wind energy money Source.And solar energy and wind energy have very strong complementarity in time and geographically, wind is small when daylight is strong, and night illumination is weak When, wind energy strengthens because earth's surface difference variation is big, and solar energy and wind energy complementarity in time are wind and solar hybrid generating systems Best match in the utilization of resources.

Wind-light combined power generation system is mainly made up of wind power generation unit, photovoltaic generation unit etc..Wind power generation unit utilizes wind-force Generating set, electric power output is converted to by wind energy.The electro-optical package of photovoltaic generation unit scale needed for, solar energy is changed It is electric power output.Two generation modes of wind-powered electricity generation and photovoltaic complement each other in the collection of the energy, while differ from one another again:Photovoltaic is sent out Electricity power supply is reliable, operation expense is low but cost is high;Wind-power electricity generation generated energy is high, cost and operation expense it is low but Reliability is low.

Wind-light combined power generation system is sufficient using wind energy and the natural complementarity of solar energy, such as solar energy on daytime, and evening wind energy is sufficient; The sufficient winter wind energy of sun in summer energy is sufficient, can improve the economy and reliability of operation of system.In NORTHWEST CHINA, North China etc. Area, wind energy and solar energy resources have complementarity, and winter and spring wind-force is big, two season of summer and autumn solar radiation it is strong, therefore, adopt Wind energy and solar energy completely can be well overcome to provide the randomness of energy, intermittent lack with wind energy/solar energy complemental power-generation Point, realizes uninterrupted power supply.

The access of wind-light combined power generation system has certain influence, and wind, light on peak load regulation network, stable operation and the quality of power supply Fluctuation make the power output of wind-light combined power generation system that there is fluctuation, it is difficult to honourable cogeneration as normal power supplies Accurate generation schedule is formulated and implemented to system.Power swing may cause voltage pulsation, frequency fluctuation and the transmission line of electricity of power network The problems such as fluctuation of transimission power, larger power rush is also possible to cause the oscillation of power between Synchronous generator in power network, The stable operation of power network can be destroyed when serious, power grid security is caused to directly affect.With the development of wind-light combined power generation system, The research for carrying out the grid-connected performance test detection technique of wind-light combined power generation system is needed badly, to ensure the grid-connected fortune of wind-light combined power generation system After row, the safe and stable operation of power system.

The content of the invention

To solve above-mentioned deficiency of the prior art, surveyed it is an object of the invention to provide a kind of grid-connected performance of wind-light combined power generation system Method for testing, normalization and accuracy tool to improving wind-powered electricity generation combined generating system on-the-spot test are of great significance.

The purpose of the present invention is realized using following technical proposals:

The present invention provides a kind of grid-connected performance test methods of wind-light combined power generation system, and it is theed improvement is that, the method for testing Comprise the steps:

Step 1:Determine the test point of wind-light combined power generation system Site Detection;

Step 2:Determine the test condition of wind-light combined power generation system Site Detection;

Step 3:Determine the test content of wind-light combined power generation system Site Detection;

Step 4:Test the grid entry point performance of wind-light combined power generation system.

Further, in the step 1, the mode of connection according to wind-light combined power generation system determines test point;Including 220kV Or 110kV grades, the grid-connected test point of 35kV grades;The electric collection point of the wind-light combined power generation system includes:Main transformer Depressor high-pressure side 220kV three-phase voltage, main transformer high-pressure side 220kV three-phase current, main transformer low-pressure side 35kV three-phases Voltage, main transformer low-pressure side 35kV three-phase currents, wind-powered electricity generation branch road grid entry point 35kV three-phase voltages, wind-powered electricity generation branch road grid entry point 35kV three-phase currents, photovoltaic branch road grid entry point 35kV three-phase voltages and photovoltaic branch road grid entry point 35kV three-phase currents.

Further, in the step 2, the test condition of wind-light combined power generation system Site Detection is:Possess and stablize grid-connected fortune Row ability, and possess the independent generator operation of wind-powered electricity generation, the independent generator operation of photovoltaic and honourable cogeneration operation;During test, It is required that wind speed possesses 3-15m/s operating modes, to ensure that blower fan power output is interval in 0 to 95%Pn;It is required that light radiation amount meets 0-7500MJ/m2, it is interval in 0 to rated power with the power output for ensuring photovoltaic plant.

Further, in the step 3, the test content of wind-light combined power generation system Site Detection includes:Combined according to scene The operation characteristic of electricity generation system, in the case where not influenceing to generate electricity, to being tested under following three kinds of operational modes, by collection The data for arriving, calculate analysis and show that (calculating is according to GB for flickering, harmonic wave and power variation rate power quality parameter What the formula in GB/T12326-2008 drew):

(1) wind-powered electricity generation normally runs, photovoltaic without exerting oneself, i.e., night it is unglazed, have in the time period of wind test;

(2) photovoltaic normally runs, and wind-powered electricity generation has light, test in the calm time period without exerting oneself on daytime;

(3) wind-powered electricity generation and photovoltaic normally run, i.e., tested under conditions of on daytime, scene is provided simultaneously with.

Further, the step 4 includes:

1. the wind-powered electricity generation and photovoltaic generation unit in wind-light combined power generation system normally run, and are acquired respectively, and sample frequency is not Less than 4kHz;

2. wind-powered electricity generation normally runs, and photovoltaic is without exerting oneself:Wind power output power from the 95% of 0 to rated power, with 10% specified work( Rate is interval, each power interval, per mutually at least collecting 5 10min time serieses instantaneous voltages of wind farm grid-connected point and instantaneous The measured value of current value;

3. photovoltaic normally runs, and wind-powered electricity generation is without exerting oneself:Since the minimum power that photo-voltaic power generation station continues normal operation, with 10% Photo-voltaic power generation station matches somebody with somebody inverter total rated power for an interval, measures 2 10min data in each interval respectively;

4. wind-powered electricity generation, photovoltaic normally run:Honourable power output, from the 95% of 0 to rated power, is area with 10% rated power Between, each power interval, every phase at least collect 5 10min time serieses instantaneous voltages of wind farm grid-connected point and instantaneous current value Measured value.

Further, the step 4 includes:According to GB《The GB/T 12326-2008 qualities of power supply, voltage fluctuation and flicker》, Calculating analysis is carried out by the data for collecting, flickering, harmonic wave and power variation rate power quality parameter is drawn, so as to judge The grid entry point performance of tested wind-light combined power generation system.

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

(1) testing scheme is reasonable in design:This test consider wind-powered electricity generation isolated operation pattern, photovoltaic isolated operation pattern, wind-powered electricity generation, Photovoltaic cogeneration operational mode, the division of these three operational modes is conducive to analyzing the grid-connected performance indications under different mode.

(2) live operational mode considers comprehensive:Because in actual field, the operational mode of wind-powered electricity generation combined generating system is different, wind-force Influencing each other between Generate, Generation, Generator volt generating is also different, it is necessary to consider different operational modes as much as possible.

(3) on-the-spot test point is chosen reasonable:Test point is selected in the grid entry point of different voltage class, so more can really reflect The grid-connected performance indications of different generator units.

Brief description of the drawings

Fig. 1 is the simple mode of connection collection point schematic diagram that the present invention is provided;

Fig. 2 is a plurality of photovoltaic branch road collection point schematic diagram that the present invention is provided;

Fig. 3 is the complicated mode of connection collection point schematic diagram that the present invention is provided;

Fig. 4 is the flow chart of the grid-connected performance test methods of wind-light combined power generation system that the present invention is provided.

Specific embodiment

Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.

The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to put into practice it .Other embodiments can include structure, logic, it is electric, process and it is other changes.Embodiment only generation The possible change of table.Unless explicitly requested, otherwise single component and function are optional, and the order for operating can change. The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.Implementation of the invention The gamut of the scope of scheme including claims, and claims all obtainable equivalent.Herein, These embodiments of the invention can individually or generally be represented that it is convenient that this is used for the purpose of with term " invention ", and And if in fact disclosing the invention more than, the scope for being not meant to automatically limit the application is any single invention or hair Bright design.

Operation characteristic of the present invention based on wind-light combined power generation system, there is provided a kind of to be surveyed specifically designed for the grid-connected performance of the electricity generation system Method for testing, including the test point of wind-light combined power generation system Site Detection, test condition, test content and method of testing, solve The problem of the grid-connected performance Site Detection of the electricity generation system.The grid-connected performance test methods of wind-light combined power generation system that the present invention is provided Flow chart it is as shown in Figure 4:

Step 1:Determine the test point of wind-light combined power generation system Site Detection:

According to the mode of connection of wind-light combined power generation system, test reconnaissance is also different.

(1) as shown in figure 1, the schematic diagram is a kind of relatively simple mode of connection.220kV or 110kV has been marked in figure Grade, the grid-connected test point of 35kV grades, following table list the specific electrical quantity for needing collection.

The electric collection point of wind-light combined power generation system of the Fig. 1 of table 1

Sequence number Collection point 1 Main transformer high-pressure side 220kV three-phase voltages 2 Main transformer high-pressure side 220kV three-phase currents 3 Main transformer low-pressure side 35kV three-phase voltages 4 Main transformer low-pressure side 35kV three-phase currents 5 Wind-powered electricity generation branch road grid entry point 35kV three-phase voltages 6 Wind-powered electricity generation branch road grid entry point 35kV three-phase currents 7 Photovoltaic branch road grid entry point 35kV three-phase voltages 8 Photovoltaic branch road grid entry point 35kV three-phase currents

(2) as shown in Fig. 2 the schematic diagram represents a kind of mode of connection with a plurality of photovoltaic generation branch road.Because of multiple photovoltaic lists Unit has differences to the performance indications of whole grid entry point, so needs are individually analyzed the test point of this kind of mode of connection.

The electric collection point of wind-light combined power generation system of the Fig. 2 of table 2

(3) as shown in figure 3, the schematic diagram represents a kind of complex mode of connection.

The electric collection point of wind-light combined power generation system of the Fig. 3 of table 3

Sequence number Collection point 1 First main transformer high-pressure side 220kV three-phase voltages 2 First main transformer high-pressure side 220kV three-phase currents 3 First main transformer low-pressure side 35kV three-phase voltages 4 First main transformer low-pressure side 35kV three-phase currents 5 First wind-powered electricity generation branch road grid entry point 35kV three-phase voltage 6 First wind-powered electricity generation branch road grid entry point 35kV three-phase current 7 First photovoltaic branch road grid entry point 35kV three-phase voltage 8 First photovoltaic branch road grid entry point 35kV three-phase current 9 Second main transformer high-pressure side 220kV three-phase voltage 10 Second main transformer high-pressure side 220kV three-phase current 11 Second main transformer low-pressure side 35kV three-phase voltage 12 Second main transformer low-pressure side 35kV three-phase current 13 Article 2 wind-powered electricity generation branch road grid entry point 35kV three-phase voltages 14 Article 2 wind-powered electricity generation branch road grid entry point 35kV three-phase currents 15 Article 2 photovoltaic branch road grid entry point 35kV three-phase voltages 16 Article 2 photovoltaic branch road grid entry point 35kV three-phase currents

Step 2:Determine the test condition of wind-light combined power generation system Site Detection:

Tested wind-light combined power generation system should possess the stable ability that is incorporated into the power networks, and possess operation, photovoltaic list that wind-powered electricity generation is individually sent out Only generator operation, honourable cogeneration operation.Test request has rational wind regime and illumination condition.

Step 3:Determine the test content of wind-light combined power generation system Site Detection:

According to the operation characteristic of wind-light combined power generation system, in the case of can not influenceing to generate electricity, under following three kinds of operational modes Tested, by the data for collecting, calculate analysis and draw the power quality parameters such as flickering, harmonic wave, power variation rate:

(1) wind-powered electricity generation normally runs, photovoltaic without exerting oneself (night it is unglazed, have in the time period of wind and test)

(2) photovoltaic normally runs, and wind-powered electricity generation (has light on daytime, tested in the calm time period) without exerting oneself

(3) wind-powered electricity generation, photovoltaic normally run (tested under conditions of on daytime, scene is provided simultaneously with)

Step 4:Determine the method for testing of wind-light combined power generation system Site Detection:According to GB《GB/T 12326-2008 electric energy Quality, voltage fluctuation and flicker》, calculating analysis is carried out by the data for collecting, draw flickering, harmonic wave and power variation rate Power quality parameter, so as to judge the grid entry point performance of tested wind-light combined power generation system.

Wind-powered electricity generation and photovoltaic generation unit in wind-light combined power generation system normally run, and are acquired respectively, and sample frequency is not low In 4kHz.

Wind-powered electricity generation normally runs, and photovoltaic is without exerting oneself.Wind power output power from the 95% of 0 to rated power, with 10% rated power It is interval, each power interval, every phase at least collect 5 10min time serieses instantaneous voltages of wind farm grid-connected point and instantaneous electricity The measured value of flow valuve.

Photovoltaic normally runs, and wind-powered electricity generation is without exerting oneself.Since the minimum power that photo-voltaic power generation station continues normal operation, with 10% light Inverter total rated power is matched somebody with somebody for an interval in volt power station, measures 2 10min data in each interval respectively.

Wind-powered electricity generation, photovoltaic normally run.Honourable power output, from the 95% of 0 to rated power, is interval with 10% rated power, Each power interval, the survey that 5 10min time serieses instantaneous voltages of wind farm grid-connected point and instantaneous current value are at least collected per phase Value.

The present invention gives the on-the-spot test content and method of wind-light combined power generation system, mainly including flickering, harmonic wave and frequency division high Amount, power control capabilities.The present invention has very heavy to the normalization and accuracy that improve wind-powered electricity generation combined generating system on-the-spot test The meaning wanted.

The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, although with reference to above-described embodiment to the present invention Be described in detail, those of ordinary skill in the art specific embodiment of the invention can still be modified or Person's equivalent, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent Within bright claims.

Claims (6)

1. grid-connected performance test methods of a kind of wind-light combined power generation system, it is characterised in that the method for testing comprises the steps:
Step 1:Determine the test point of wind-light combined power generation system Site Detection;
Step 2:Determine the test condition of wind-light combined power generation system Site Detection;
Step 3:Determine the test content of wind-light combined power generation system Site Detection;
Step 4:Test the grid entry point performance of wind-light combined power generation system.
2. grid-connected performance test methods as claimed in claim 1, it is characterised in that in the step 1, combined according to scene The mode of connection of electricity generation system determines test point;Including 220kV or 110kV grades, the grid-connected test point of 35kV grades;Institute The electric collection point for stating wind-light combined power generation system includes:Main transformer high-pressure side 220kV three-phase voltage, main transformer high-pressure side 220kV three-phase currents, main transformer low-pressure side 35kV three-phase voltages, main transformer low-pressure side 35kV three-phase currents, wind-powered electricity generation branch Road grid entry point 35kV three-phase voltage, wind-powered electricity generation branch road grid entry point 35kV three-phase currents, photovoltaic branch road grid entry point 35kV three-phase voltages With photovoltaic branch road grid entry point 35kV three-phase currents.
3. grid-connected performance test methods as claimed in claim 1, it is characterised in that in the step 2, honourable cogeneration System for field detection test condition be:Possess the stable ability that is incorporated into the power networks, and possess the independent generator operation of wind-powered electricity generation, photovoltaic list Only generator operation and honourable cogeneration operation;During test, it is desirable to which wind speed possesses 3-15m/s operating modes, to ensure that blower fan is exported Power is interval in 0 to 95%Pn;It is required that light radiation amount meets 0-7500MJ/m2, existed with the power output for ensuring photovoltaic plant 0 to rated power is interval.
4. grid-connected performance test methods as claimed in claim 1, it is characterised in that in the step 3, honourable cogeneration The test content of system for field detection includes:According to the operation characteristic of wind-light combined power generation system, in the case where not influenceing to generate electricity, To being tested under following three kinds of operational modes, by the data for collecting, calculate analysis and draw flickering, harmonic wave and changed power Rate power quality parameter:
(1) wind-powered electricity generation normally runs, photovoltaic without exerting oneself, i.e., night it is unglazed, have in the time period of wind test;
(2) photovoltaic normally runs, and wind-powered electricity generation has light, test in the calm time period without exerting oneself on daytime;
(3) wind-powered electricity generation and photovoltaic normally run, i.e., tested under conditions of on daytime, scene is provided simultaneously with.
5. grid-connected performance test methods as claimed in claim 1, it is characterised in that the step 4 includes:
1. the wind-powered electricity generation and photovoltaic generation unit in wind-light combined power generation system normally run, and are acquired respectively, and sample frequency is not Less than 4kHz;
2. wind-powered electricity generation normally runs, and photovoltaic is without exerting oneself:Wind power output power from the 95% of 0 to rated power, with 10% specified work( Rate is interval, each power interval, per mutually at least collecting 5 10min time serieses instantaneous voltages of wind farm grid-connected point and instantaneous The measured value of current value;
3. photovoltaic normally runs, and wind-powered electricity generation is without exerting oneself:Since the minimum power that photo-voltaic power generation station continues normal operation, with 10% Photo-voltaic power generation station matches somebody with somebody inverter total rated power for an interval, measures 2 10min data in each interval respectively;
4. wind-powered electricity generation, photovoltaic normally run:Honourable power output, from the 95% of 0 to rated power, is area with 10% rated power Between, each power interval, every phase at least collect 5 10min time serieses instantaneous voltages of wind farm grid-connected point and instantaneous current value Measured value.
6. grid-connected performance test methods as claimed in claim 1, it is characterised in that the step 4 includes:According to GB《GB/T The 12326-2008 qualities of power supply, voltage fluctuation and flicker》, carry out calculating analysis by the data for collecting, draw flickering, Harmonic wave and power variation rate power quality parameter, so as to judge the grid entry point performance of tested wind-light combined power generation system.
CN201510907106.4A 2015-12-09 2015-12-09 Grid-connected performance testing method for wind-solar combined power generation system CN106856331B (en)

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