CN107086661A - The design method and input method of a kind of wind power plant driftage emergency power system - Google Patents

The design method and input method of a kind of wind power plant driftage emergency power system Download PDF

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CN107086661A
CN107086661A CN201710280502.8A CN201710280502A CN107086661A CN 107086661 A CN107086661 A CN 107086661A CN 201710280502 A CN201710280502 A CN 201710280502A CN 107086661 A CN107086661 A CN 107086661A
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inductance
power system
mrow
power plant
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CN107086661B (en
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欧柳利
马学亮
宋晓瑛
刘冰鑫
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MingYang Smart Energy Group Co Ltd
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MingYang Smart Energy Group Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The invention discloses a kind of design method of wind power plant driftage emergency power system and input method, this method considers the start-up course of emergency power system and yaw motor, carries out Capacity design, it is ensured that emergency power system and yaw motor can normally start.Emulated using the equivalent circuit of wind power plant cable, so that it is determined that reactive compensation capacity, can more accurately compensate the reactive power in wind power plant.The angle design resonance restraining device analyzed from the amplitude-versus-frequency curve of wind power plant equivalent circuit, it is ensured that the reasonability and resonance peak of resonant frequency are smaller, can effectively reduce the harmonic wave in system.In a word, the dash current of diesel generating set outlet and collection electric line can be effectively reduced using the inventive method, it is ensured that emergency power system with normal operation and can ensure that yaw motor can normally start and stable operation.

Description

The design method and input method of a kind of wind power plant driftage emergency power system
Technical field
The present invention relates to the technical field of wind power plant driftage emergency power system design, a kind of wind power plant driftage is referred in particular to Emergency power system design method and input method.
Background technology
Wind power plant driftage emergency power system is the collection electric line that wind power plant is accessed when wind power plant and external power grid disconnect, and is The normal operation of set yaw motor provides emergency power supply.Emergency power system includes diesel generating set, step-up transformer, nothing Reactive power compensation installations and resonance restraining device.Current wind power plant is gone off course, and emergency power system design is main to consider emergency power supply and inclined Avionics machine is in steady operational status, and ignores the transient process of emergency power supply and yaw motor.However, emergency power supply and driftage Can the start-up course of motor be to influence emergency power system enter the key of steady operational status.Wherein, diesel generating set Investing method with reactive power compensator is improper, then is likely to result in that dash current is excessive, and equipment is cut out automatically；Diesel generating set Select improper with capacity of reactive power compensation device, then can not ensure that line voltage distribution is stable and normally be opened with yaw motor near rated value It is dynamic.
The content of the invention
It is an object of the invention to the shortcoming and deficiency for overcoming prior art, there is provided one kind consideration emergency power supply and motor The design method and input method of the wind power plant driftage emergency power system of transient process, can either ensure that dash current is smaller again It ensure that yaw motor normally starts and stable operation, so as to ensure that emergency power system can smoothly be put into and stable fortune OK.
To achieve the above object, technical scheme provided by the present invention is：A kind of wind power plant driftage emergency power system Design method, the wind power plant driftage emergency power system is harmonious by diesel generating set, step-up transformer, reactive power compensator The restraining device that shakes is constituted；This method comprises the following steps：
1) according to the cable model and cabled manner of wind power plant collection electric line, set up in power system simulation software Cabling diagram, transformer Equivalent Model is set up simultaneously according to wind chassis type transformer test parameter in power system simulation software Access set electric line respective nodes, set up yaw motor equivalent according to yaw motor test parameters in power system simulation software Model and access set electric line respective nodes；
2) wind-powered electricity generation field ionization source is simulated using ideal source in power system simulation software and accesses wind power plant collection electric line Emergency power supply access node, measurement ideal source active power of output and reactive power runs simulation model, and record ideal Power supply active power of output and reactive capability curve；
3) peak value of record active power curves records the steady of reactive capability curve as the capacity Pg of diesel generating set Definite value is as the capacity Qc of reactive power compensator, and the capacity St of step-up transformer elects St=Pg/0.8 as；
4) rated voltage of reactive power compensator line attachment is set as Uc, obtains the impedance Z N=Uc of reactive power compensator2/ |Qc|；If Qc<0, then need reactor as reactive power compensator, then calculate inductance value Lc=ZN/ ω, wherein ω=2 × π ×50；If Qc>0, then need electric capacity as reactive power compensator, then calculate capacitance Cc=1/ (ZN × ω)；
5) electric capacity of the cable for each cable model that adds up is worth to the total capacitance Cl of wind power plant collection electric line, and add up each cable The inductance of model is worth to current collection circuit total inductance Ll, add up each cable model resistance be worth to current collection circuit all-in resistance Rl；Examine Consider Qc<0, it is necessary to which reactor is as the situation of reactive power compensator, and designing wind power plant equivalent circuit is：With voltage source-representation diesel oil Generating set, the leakage inductance L of diesel generating set outlet connection step-up transformert, the leakage inductance L of step-up transformertSuppress to fill through resonance Put the resistance R of parallel connectiondWith inductance LdConnect the inductance L of reactive power compensator respectively afterwardscWith the total capacitance C of circuitlAnd circuit is total Inductance Ll, wherein, the inductance L of reactive power compensatorcGround connection, the total capacitance C of circuitlGround connection, the total inductance L of circuitlConnection line All-in resistance Rl；From diesel generating set to step-up transformer direction as electric current positive direction, to define diesel generating set output Electric current is i1, diesel generating set output voltage is u1, with voltage u1For input, electric current i1For output, obtaining transmission function is：
6) R is setd=k ω Ld, wherein k=1.5,2,3,4,5；First, if k=1.5, Rd=10,30,50,70,90, 110 ..., the amplitude-versus-frequency curve of above-mentioned transmission function is drawn, equally, k=2,3,4,5, R are drawnd=10,30,50,70,90, 110 ... amplitude-versus-frequency curve, and in these amplitude-versus-frequency curves, the resonant frequency of selection avoid 3,5 subfrequencies and Amplitude at resonant frequency is small to have no the amplitude-versus-frequency curve of obvious spike, and records the corresponding resistance R of the amplitude-versus-frequency curved With k values, and then calculate inductanceSo far, it becomes possible to obtain the resistance and inductance of resonance restraining device.
The input method of wind power plant driftage emergency power system is：After outer net power-off, first by diesel-driven generator The switch and reactive power compensator and collection electric wire between switch, step-up transformer and collection electric line between group and step-up transformer Switch closure between road, the switch between the collection electric line of all connecting fans and the collection electric line for connecting backup power system Closure；Then prime mover of diesel generating set starts to start and rise rotating speed, after rotating speed reaches synchronous rotational speed, access diesel oil hair Group of motors exciting current, collection electric line starts to boost to rated voltage.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, consider the start-up course of emergency power system and yaw motor, carry out Capacity design, it is ensured that emergency power system Can normally it start with yaw motor.
2nd, emulated using the equivalent circuit of wind power plant cable, so that it is determined that reactive compensation capacity, can be more accurately Compensate the reactive power in wind power plant.
3rd, the angle design resonance restraining device analyzed from the amplitude-versus-frequency curve of wind power plant equivalent circuit, it is ensured that resonance frequency The reasonability and resonance peak of rate are smaller, can effectively reduce the harmonic wave in system.
4th, the dash current of diesel generating set outlet and collection electric line can be effectively reduced using the inventive method, it is ensured that Emergency power system can be with normal operation.
Brief description of the drawings
Fig. 1 is the structural representation of wind power plant driftage emergency power system.
Fig. 2 is wind power plant equivalent circuit schematic diagram.
Fig. 3 is the amplitude-versus-frequency curve figure of transmission function.
Fig. 4 avoids that amplitude at 3,5 subfrequencies and resonant frequency is small to have no obvious spike for the resonant frequency chosen Amplitude-versus-frequency curve figure.
Embodiment
With reference to specific embodiment, the invention will be further described.
As shown in figure 1, wind power plant is gone off course, emergency power system is filled by diesel generating set, step-up transformer, reactive-load compensation Put and constituted with resonance restraining device.And the design method for the wind power plant driftage emergency power system that the present embodiment is provided, specifically It is setting for diesel-driven generator pool-size, step-up transformer capacity, capacity of reactive power compensation device and resonance restraining device parameter Meter method, comprises the following steps：
1) according to the cable model and cabled manner of wind power plant collection electric line, set up in power system simulation software Cabling diagram, transformer Equivalent Model is set up simultaneously according to wind chassis type transformer test parameter in power system simulation software Access set electric line respective nodes, set up yaw motor equivalent according to yaw motor test parameters in power system simulation software Model and access set electric line respective nodes.
2) wind-powered electricity generation field ionization source is simulated using ideal source in power system simulation software and accesses wind power plant collection electric line Emergency power supply access node, measurement ideal source active power of output and reactive power；Simulation model is run, and records ideal Power supply active power of output and reactive capability curve.
3) peak value of record active power curves records the steady of reactive capability curve as the capacity Pg of diesel generating set Definite value is as the capacity Qc of reactive power compensator, and the capacity St of step-up transformer elects St=Pg/0.8 as.
4) rated voltage of reactive power compensator line attachment is set as Uc, obtains the impedance Z N=Uc of reactive power compensator2/ |Qc|；If Qc<0, then need reactor as reactive power compensator, then calculate inductance value Lc=ZN/ ω, wherein ω=2 × π ×50；If Qc>0, then need electric capacity as reactive power compensator, then calculate capacitance Cc=1/ (ZN × ω).
5) electric capacity of the cable for each cable model that adds up is worth to the total capacitance C of wind power plant collection electric linel, add up each cable The inductance of model is worth to current collection circuit total inductance Ll, add up each cable model resistance be worth to current collection circuit all-in resistance Rl；Examine Consider Qc<0, it is necessary to which reactor draws wind power plant equivalent circuit as shown in Fig. 2 in figure, L as the situation of reactive power compensatortIt is The leakage inductance of the step-up transformer of diesel generating set outlet, RdAnd LdIt is the resistance and inductance of resonance restraining device, L respectivelycIt is nothing The inductance of Reactive power compensation installations, ClIt is the total capacitance of circuit, LlIt is the total inductance of circuit, RlIt is the all-in resistance of circuit, designs wind power plant Equivalent circuit is：With voltage source-representation diesel generating set, the leakage inductance L of diesel generating set outlet connection step-up transformert, rise The leakage inductance L of pressure transformertThrough resonance restraining device resistance R in paralleldWith inductance LdConnect the inductance of reactive power compensator respectively afterwards LcWith the total capacitance C of circuitlAnd the total inductance L of circuitl, wherein, the inductance L of reactive power compensatorcGround connection, the circuit it is total Electric capacity ClGround connection, the total inductance L of circuitlThe all-in resistance R of connection linel；Using from diesel generating set to step-up transformer direction as Electric current positive direction, it is i to define diesel generating set output current1, diesel generating set output voltage is u1, with voltage u1To be defeated Enter, electric current i1For output, obtaining transmission function is：
6) R is setd=k ω Ld, wherein k=1.5,2,3,4,5；First, if k=1.5, Rd=10,30,50,70,90, 110 ..., the amplitude-versus-frequency curve of above-mentioned transmission function is drawn, as shown in Figure 3.Equally, k=2,3,4,5, R are drawnd=10,30, 50th, 70,90,110 ... amplitude-versus-frequency curve, and in these amplitude-versus-frequency curves, the resonant frequency of selection avoids 3,5 times it is humorous The small amplitude-versus-frequency curve for having no obvious spike of amplitude at wave frequency rate and resonant frequency, as shown in figure 4, and to record the amplitude-frequency special The corresponding resistance R of linearity curvedWith k values, and then calculate inductanceSo far, it becomes possible to obtain the electricity of resonance restraining device Resistance and inductance.
Above-mentioned design wind power plant driftage emergency power system investing method be：After outer net power-off, first by diesel oil Switch and reactive power compensator between switch, step-up transformer between generating set and step-up transformer and collection electric line with Collect the switch closure between electric line, between the collection electric line of all connecting fans and the collection electric line for connecting backup power system Switch closure；Then prime mover of diesel generating set starts to start and rise rotating speed, after rotating speed reaches synchronous rotational speed, access Diesel generating set exciting current, collection electric line starts to boost to rated voltage.
Embodiment described above is only the preferred embodiments of the invention, and the practical range of the present invention is not limited with this, Therefore the change that all shape, principles according to the present invention are made, it all should cover within the scope of the present invention.

Claims (2)

  1. A kind of design method of emergency power system 1. wind power plant is gone off course, the wind power plant driftage emergency power system is sent out by diesel oil Group of motors, step-up transformer, reactive power compensator and resonance restraining device are constituted；Characterized in that, this method includes following step Suddenly：
    1) according to the cable model and cabled manner of wind power plant collection electric line, cable is set up in power system simulation software Connection figure, sets up transformer Equivalent Model according to wind chassis type transformer test parameter and accesses in power system simulation software Collect electric line respective nodes, yaw motor Equivalent Model is set up in power system simulation software according to yaw motor test parameters And access set electric line respective nodes；
    2) wind-powered electricity generation field ionization source is simulated using ideal source in power system simulation software and accesses answering for wind power plant collection electric line Urgent telegram source access node, measurement ideal source active power of output and reactive power, run simulation model, and record ideal source Active power of output and reactive capability curve；
    3) peak value of record active power curves records the stationary value of reactive capability curve as the capacity Pg of diesel generating set As the capacity Qc of reactive power compensator, the capacity St of step-up transformer elects St=Pg/0.8 as；
    4) rated voltage of reactive power compensator line attachment is set as Uc, obtains the impedance Z N=Uc of reactive power compensator2/|Qc|； If Qc<0, then need reactor as reactive power compensator, then calculate inductance value Lc=ZN/ ω, wherein ω=2 × π × 50； If Qc>0, then need electric capacity as reactive power compensator, then calculate capacitance Cc=1/ (ZN × ω)；
    5) electric capacity of the cable for each cable model that adds up is worth to the total capacitance C of wind power plant collection electric linel, add up each cable model Inductance be worth to current collection circuit total inductance Ll, add up each cable model resistance be worth to current collection circuit all-in resistance Rl；Consider Qc <0, it is necessary to which reactor is as the situation of reactive power compensator, and designing wind power plant equivalent circuit is：With voltage source-representation diesel generation Unit, the leakage inductance L of diesel generating set outlet connection step-up transformert, the leakage inductance L of step-up transformertThrough resonance restraining device simultaneously The resistance R of connectiondWith inductance LdConnect the inductance L of reactive power compensator respectively afterwardscWith the total capacitance C of circuitlAnd the total inductance of circuit Ll, wherein, the inductance L of reactive power compensatorcGround connection, the total capacitance C of circuitlGround connection, the total inductance L of circuitlConnection line it is total Resistance Rl；From diesel generating set to step-up transformer direction as electric current positive direction, to define diesel generating set output current For i1, diesel generating set output voltage is u1, with voltage u1For input, electric current i1For output, obtaining transmission function is：
    <mrow> <mfrac> <msub> <mi>i</mi> <mn>1</mn> </msub> <msub> <mi>u</mi> <mn>1</mn> </msub> </mfrac> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mrow> <mo>(</mo> <msub> <mi>R</mi> <mi>d</mi> </msub> <mo>+</mo> <msub> <mi>sL</mi> <mi>d</mi> </msub> <mo>)</mo> <mo>(</mo> <msup> <mi>s</mi> <mn>2</mn> </msup> <msub> <mi>L</mi> <mi>c</mi> </msub> <msub> <mi>C</mi> <mi>l</mi> </msub> <mo>+</mo> <mn>1</mn> <mo>)</mo> </mrow> <mrow> <mi>s</mi> <mo>&amp;lsqb;</mo> <msup> <mi>s</mi> <mn>3</mn> </msup> <msub> <mi>L</mi> <mi>c</mi> </msub> <msub> <mi>C</mi> <mi>l</mi> </msub> <msub> <mi>L</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>t</mi> </msub> <mo>+</mo> <msup> <mi>s</mi> <mn>2</mn> </msup> <mrow> <mo>(</mo> <msub> <mi>L</mi> <mi>c</mi> </msub> <msub> <mi>C</mi> <mi>l</mi> </msub> <msub> <mi>R</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>d</mi> </msub> <mo>+</mo> <msub> <mi>L</mi> <mi>c</mi> </msub> <msub> <mi>C</mi> <mi>l</mi> </msub> <msub> <mi>R</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>t</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>L</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>c</mi> </msub> <mo>+</mo> <msub> <mi>L</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>t</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <mi>R</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>d</mi> </msub> <mo>+</mo> <msub> <mi>R</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>c</mi> </msub> <mo>+</mo> <msub> <mi>R</mi> <mi>d</mi> </msub> <msub> <mi>L</mi> <mi>t</mi> </msub> <mo>&amp;rsqb;</mo> </mrow> </mfrac> </mrow>
    6) R is setd=k ω Ld, wherein k=1.5,2,3,4,5；First, if k=1.5, Rd=10,30,50,70,90,110 ..., paint The amplitude-versus-frequency curve of above-mentioned transmission function is made, equally, k=2,3,4,5, R are drawnd=10,30,50,70,90,110 ... width Frequency characteristic curve, and in these amplitude-versus-frequency curves, the resonant frequency of selection is avoided at 3,5 subfrequencies and resonant frequency Amplitude it is small have no the amplitude-versus-frequency curve of obvious spike, and record the corresponding resistance R of the amplitude-versus-frequency curvedWith k values, and then Calculate inductanceSo far, it becomes possible to obtain the resistance and inductance of resonance restraining device.
  2. The input method of emergency power system 2. wind power plant described in a kind of claim 1 is gone off course, it is characterised in that：In outer net power-off Afterwards, first by the switch between diesel generating set and step-up transformer, step-up transformer and collection electric line between switch and Switch between reactive power compensator and collection electric line is closed, and the collection electric line of all connecting fans is with being connected backup power system Collection electric line between switch closure；Then prime mover of diesel generating set starts to start and rise rotating speed, treats that rotating speed reaches After synchronous rotational speed, diesel generating set exciting current is accessed, collection electric line starts to boost to rated voltage.
CN201710280502.8A 2017-04-26 2017-04-26 Design method and input method of wind power plant yaw emergency power supply system Active CN107086661B (en)

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CN112865103A (en) * 2020-12-31 2021-05-28 天津经纬正能电气设备有限公司 System design method for eliminating harmonic resonance of wind power plant emergency power supply system
CN114157011A (en) * 2021-11-01 2022-03-08 国能神福(龙岩)发电有限公司 Safety power supply system

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