CN113315164B - Reactive voltage control method and device, medium and computing device - Google Patents

Reactive voltage control method and device, medium and computing device Download PDF

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CN113315164B
CN113315164B CN202011447722.3A CN202011447722A CN113315164B CN 113315164 B CN113315164 B CN 113315164B CN 202011447722 A CN202011447722 A CN 202011447722A CN 113315164 B CN113315164 B CN 113315164B
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coefficient
proportional
integral
circuit capacity
predetermined value
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CN113315164A (en
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于连富
乔元
刘艳录
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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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
    • 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
    • H02J3/12Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
    • H02J3/16Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load by adjustment of reactive power
    • 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
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • H02J2300/28The renewable source being wind 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
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The disclosure provides a reactive voltage control method and device, a medium and a computing device. The reactive voltage control method comprises the following steps: determining the short-circuit capacity ratio of the system operation according to the short-circuit capacity of the system operation and the rated power of the new energy station; determining a proportional coefficient and an integral coefficient of a proportional-integral algorithm according to the range of the short-circuit capacity ratio of the system; and performing reactive voltage control by using a proportional integral algorithm based on the determined proportional coefficient and integral coefficient. According to the reactive voltage control method provided by the embodiment of the invention, the reactive voltage can be quickly and accurately controlled.

Description

无功电压控制方法和装置、介质以及计算装置Reactive voltage control method and device, medium and computing device

技术领域technical field

本发明总体说来涉及新能源领域,更具体地讲,涉及一种无功电压控制方法和装置、介质以及计算装置。The present invention generally relates to the field of new energy sources, and more specifically, relates to a reactive voltage control method and device, a medium, and a computing device.

背景技术Background technique

在电力系统的整个能源中,随着新能源占比的不断提高,单机容量的不断增大,场站装机容量也在屡创新高。In the entire energy of the power system, with the continuous increase of the proportion of new energy and the continuous increase of the capacity of the single machine, the installed capacity of the station is also hitting new highs repeatedly.

新能源场站开发具有规模大、开发模式集中等特点。但由于新能源发电固有的间歇性特点,大规模新能源并网给电网运行带来了极大的挑战。加之新能源并网区域往往缺乏本地负荷和常规电源支撑,新能源场站发出的电能需要经过长距离送至负荷中心,造成送电通道随新能源出力的变化而无功电压波动较大。因此对新能源场站的无功控制和电压稳定性提出了越来越高的要求。The development of new energy stations has the characteristics of large scale and concentrated development mode. However, due to the inherent intermittent characteristics of new energy power generation, large-scale new energy grid integration has brought great challenges to grid operation. In addition, new energy grid-connected areas often lack local load and conventional power supply support, and the electric energy generated by new energy stations needs to be sent to the load center through long distances, resulting in large reactive voltage fluctuations in power transmission channels with changes in new energy output. Therefore, higher and higher requirements are put forward for the reactive power control and voltage stability of new energy stations.

传统的电压和无功功率控制理论和技术虽已比较成熟,但受系统整体拓扑结构,通信等诸多因素限制,目前所应用的无功控制方法,均只考虑电力系统当前时间断面,只有发现实际系统测量电压值超过阈值或接近阈值时才会触发控制逻辑,这实际上是一种滞后控制,在本质上是被动控制。但新能源发电往往负荷波动性较大,对电压的变化影响较大,这导致目前基于系统阻抗方式的单步式调控方式不能满足控制需求,因此对于场站控制系统,需要快速闭环的控制方式,以便于快速跟踪系统电压的变化,并及时对电压进行纠偏调整控制,使电压快速高精度的处于运行控制目标范围内。Although the traditional voltage and reactive power control theory and technology are relatively mature, but due to the constraints of the overall system topology, communication and many other factors, the currently applied reactive power control methods only consider the current time section of the power system, and only find the actual time section. The control logic is triggered only when the measured voltage value of the system exceeds or approaches the threshold, which is actually a kind of hysteresis control and passive control in nature. However, new energy power generation often has large load fluctuations and has a great impact on voltage changes. This leads to the fact that the current single-step regulation method based on the system impedance method cannot meet the control requirements. Therefore, for the station control system, a fast closed-loop control method is required. , so as to quickly track the change of the system voltage, and timely adjust and control the voltage, so that the voltage can be quickly and accurately within the target range of operation control.

发明内容Contents of the invention

本发明的示例性实施例的目的在于提供一种能够快速控制无功电压的无功电压控制方法及无功电压控制装置。An object of exemplary embodiments of the present invention is to provide a reactive voltage control method and a reactive voltage control device capable of rapidly controlling reactive voltage.

根据本发明的一方面,提供一种无功电压控制方法,该无功电压控制方法包括:根据系统运行短路容量以及新能源场站的额定功率确定系统运行短路容量比;根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数;利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制。According to one aspect of the present invention, a reactive voltage control method is provided. The reactive voltage control method includes: determining the system operating short-circuit capacity ratio according to the system operating short-circuit capacity and the rated power of the new energy station; according to the system operating short-circuit capacity ratio The range determines the proportional coefficient and integral coefficient of the proportional integral algorithm; the reactive power voltage control is carried out by using the proportional integral algorithm based on the determined proportional coefficient and integral coefficient.

根据本发明的实施例,无功电压控制方法还可包括:获取新能源场站的高压侧或低压侧的电气信息量;基于电气信息量计算系统运行短路容量。According to an embodiment of the present invention, the reactive voltage control method may further include: obtaining electrical information of the high-voltage side or low-voltage side of the new energy station; and calculating the operating short-circuit capacity of the system based on the electrical information.

根据本发明的实施例,获取新能源场站的高压侧或低压侧的电气信息量的步骤可包括:获取新能源场站的高压侧或低压侧的在当前时刻的电气信息量以及上一时刻的电气信息量,电气信息量包括有功功率、无功功率和电压;基于电气信息量计算系统运行短路容量的步骤包括:基于获取的当前时刻的电气信息量以及上一时刻的电气信息量计算系统运行短路容量。According to an embodiment of the present invention, the step of obtaining the electrical information of the high-voltage side or the low-voltage side of the new energy station may include: obtaining the electrical information of the high-voltage side or the low-voltage side of the new energy station at the current moment and the previous moment The amount of electrical information, the amount of electrical information includes active power, reactive power and voltage; the step of calculating the operating short-circuit capacity of the system based on the amount of electrical information includes: calculating the system based on the amount of electrical information obtained at the current moment and the amount of electrical information at the previous moment Operating short circuit capacity.

根据本发明的实施例,根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤可包括:响应于系统运行短路容量比大于预定阈值,确定系统运行短路容量比有效。According to an embodiment of the present invention, the step of determining the proportional coefficient and the integral coefficient of the proportional-integral algorithm according to the range of the operating short-circuit capacity ratio of the system may include: in response to the operating short-circuit capacity ratio of the system being greater than a predetermined threshold, determining that the operating short-circuit capacity ratio of the system is valid .

根据本发明的实施例,根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤可包括:当系统运行短路容量比处在不同的范围时,确定不同的比例系数和不同的积分系数。According to an embodiment of the present invention, the step of determining the proportional coefficient and the integral coefficient of the proportional-integral algorithm according to the range of the operating short-circuit capacity ratio of the system may include: determining different proportional coefficients when the operating short-circuit capacity ratio of the system is in a different range and different integral coefficients.

根据本发明的实施例,当系统运行短路容量比大于第一预定值时,可确定比例积分算法的比例系数和积分系数分别为第一比例系数和第一积分系数;当系统运行短路容量比大于第二预定值并且小于等于第一预定值时,可确定比例积分算法的比例系数和积分系数分别为第二比例系数和第二积分系数;当系统运行短路容量比大于第三预定值并且小于等于第二预定值时,可确定比例积分算法的比例系数和积分系数分别为第三比例系数和第三积分系数。According to an embodiment of the present invention, when the operating short-circuit capacity ratio of the system is greater than the first predetermined value, the proportional coefficient and the integral coefficient of the proportional-integral algorithm may be determined to be the first proportional coefficient and the first integral coefficient respectively; when the operating short-circuit capacity ratio of the system is greater than When the second predetermined value is less than or equal to the first predetermined value, the proportional coefficient and integral coefficient of the proportional integral algorithm can be determined to be the second proportional coefficient and the second integral coefficient respectively; when the system operation short-circuit capacity ratio is greater than the third predetermined value and less than or equal to When the second predetermined value is used, the proportional coefficient and the integral coefficient of the proportional integral algorithm may be determined to be the third proportional coefficient and the third integral coefficient respectively.

根据本发明的实施例,利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制的步骤可包括:以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,计算新能源场站的无功源的控制指令,并且向无功源下发控制指令,以使无功电压趋近无功电压目标值。According to an embodiment of the present invention, the step of using the proportional-integral algorithm based on the determined proportional coefficient and integral coefficient to control the reactive voltage may include: taking the deviation between the target value of the reactive voltage and the actual reactive voltage as the input of the proportional-integral algorithm, Calculate the control command of the reactive power source of the new energy station, and issue the control command to the reactive power source so that the reactive power voltage approaches the target value of the reactive power voltage.

根据本发明的另一方面,提供一种计算机可读存储介质,计算机可读存储介质存储有指令或代码,当指令或代码由处理器执行时实现上述无功电压控制方法。According to another aspect of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions or codes. When the instructions or codes are executed by a processor, the above reactive voltage control method is implemented.

根据本发明的另一方面,提供一种无功电压控制装置,无功电压控制装置可包括:系统运行短路容量比确定模块,被配置为根据系统运行短路容量以及新能源场站的额定功率计算系统运行短路容量比;系数确定模块,被配置为根据系统运行短路容量比所处的范围确定比例积分控制器的比例系数和积分系数;无功电压控制模块,被配置为利用基于确定的比例系数和积分系数的比例积分控制器进行无功电压控制。According to another aspect of the present invention, a reactive voltage control device is provided. The reactive voltage control device may include: a system operating short-circuit capacity ratio determination module configured to calculate the system operating short-circuit capacity and the rated power of the new energy station The system operating short-circuit capacity ratio; the coefficient determination module is configured to determine the proportional coefficient and the integral coefficient of the proportional-integral controller according to the range of the system operating short-circuit capacity ratio; the reactive voltage control module is configured to use the determined proportional coefficient based on The proportional-integral controller with integral coefficient performs reactive voltage control.

根据本发明的实施例,无功电压控制装置还可包括:检测模块,被配置为获取新能源场站的高压侧或低压侧的电气信息量;计算模块,被配置为基于电气信息量计算系统运行短路容量。According to an embodiment of the present invention, the reactive voltage control device may further include: a detection module configured to obtain electrical information on the high-voltage side or low-voltage side of the new energy station; a calculation module configured to calculate the system based on the electrical information Operating short circuit capacity.

根据本发明的实施例,系数确定模块可被进一步配置为:响应于系统运行短路容量比大于预定阈值,确定系统运行短路容量比有效。According to an embodiment of the present invention, the coefficient determination module may be further configured to: determine that the system operating short-circuit capacity ratio is valid in response to the system operating short-circuit capacity ratio being greater than a predetermined threshold.

根据本发明的实施例,系数确定模块可被进一步配置为:响应于系统运行短路容量比大于第一预定值时,确定比例积分控制器的比例系数和积分系数分别为第一比例系数和第一积分系数;响应于系统运行短路容量比大于第二预定值并且小于等于第一预定值时,确定比例积分控制器的比例系数和积分系数分别为第二比例系数和第二积分系数;响应于系统运行短路容量比大于第三预定值并且小于等于第二预定值,确定比例积分控制器的比例系数和积分系数分别为第三比例系数和第三积分系数。According to an embodiment of the present invention, the coefficient determination module may be further configured to: in response to when the operating short-circuit capacity ratio of the system is greater than the first predetermined value, determine the proportional coefficient and the integral coefficient of the proportional-integral controller to be the first proportional coefficient and the first Integral coefficient; in response to when the system operating short-circuit capacity ratio is greater than the second predetermined value and less than or equal to the first predetermined value, the proportional coefficient and the integral coefficient of the proportional integral controller are determined to be the second proportional coefficient and the second integral coefficient respectively; in response to the system The operating short-circuit capacity ratio is greater than the third predetermined value and less than or equal to the second predetermined value, and the proportional coefficient and the integral coefficient of the proportional-integral controller are determined to be the third proportional coefficient and the third integral coefficient respectively.

根据本发明的另一方面,提供一种计算装置,该计算装置包括计算机可读存储介质以及处理器,计算机可读存储介质存储有指令或代码,当指令或代码由处理器执行时上述无功电压控制方法。According to another aspect of the present invention, a computing device is provided, the computing device includes a computer-readable storage medium and a processor, the computer-readable storage medium stores instructions or codes, and when the instructions or codes are executed by the processor, the above reactive voltage control method.

将在接下来的描述中部分阐述本发明总体构思另外的方面和/或优点,还有一部分通过描述将是清楚的,或者可以经过本发明总体构思的实施而得知。Additional aspects and/or advantages of the present general inventive concept will be partially set forth in the following description, and some will be clear from the description, or can be learned through practice of the present general inventive concept.

附图说明Description of drawings

通过下面结合示例性地示出实施例的附图进行的描述,本发明示例性实施例的上述和其他目的和特点将会变得更加清楚,其中:The above and other objects and features of exemplary embodiments of the present invention will become more apparent from the following descriptions in conjunction with the accompanying drawings exemplarily showing the embodiments, in which:

图1是示出根据本发明的第一实施例的无功电压控制方法的流程图;1 is a flowchart showing a reactive voltage control method according to a first embodiment of the present invention;

图2是示出根据本发明的第二实施例的无功电压控制方法的流程图;FIG. 2 is a flowchart showing a reactive voltage control method according to a second embodiment of the present invention;

图3是示出根据本发明的第三实施例的无功电压控制方法的流程图;FIG. 3 is a flowchart showing a reactive voltage control method according to a third embodiment of the present invention;

图4是新能源场站的供电系统的简化等效电路图。Fig. 4 is a simplified equivalent circuit diagram of the power supply system of the new energy station.

图5是示出根据本发明的第一实施例的无功电压控制装置的框图;5 is a block diagram showing a reactive voltage control device according to a first embodiment of the present invention;

图6是示出根据本发明的第二实施例的无功电压控制装置的框图。FIG. 6 is a block diagram showing a reactive voltage control device according to a second embodiment of the present invention.

具体实施方式Detailed ways

现将详细参照本发明的实施例,所述实施例的示例在附图中示出,其中,相同的标号始终指示相同的部件。以下将通过参照附图来说明所述实施例,以便解释本发明。Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

根据本发明的实施例,采用快速PI控制策略对供电系统的无功电压进行控制,整体控制具有调整速度快,精度高的优点。According to the embodiment of the present invention, a fast PI control strategy is adopted to control the reactive voltage of the power supply system, and the overall control has the advantages of fast adjustment speed and high precision.

此外,本发明进一步考虑到系统运行方式的多变性,引入实时系统运行短路容量,并根据实时系统运行短路容量计算得到新能源场站的实时系统运行短路容量比,以此表征系统的强弱程度,进一步根据系统强弱程度将PI参数进行整体划分,进行分段控制。In addition, the present invention further considers the variability of the system operation mode, introduces the real-time system operation short-circuit capacity, and calculates the real-time system operation short-circuit capacity ratio of the new energy station according to the real-time system operation short-circuit capacity, so as to represent the strength of the system , and further divide the PI parameters as a whole according to the strength of the system, and carry out segmental control.

在新能源供电系统的实际运行中,如果运行方式发生较大变化,会直接以系统运行短路容量比的方式反映出来,如此便可结合系统运行短路容量比及时对系统无功电压控制参数进行实时调整,这使得PI控制参数得到在线修正,保证了整体控制在整个时间维度上均能保证高精度和快速响应速度,与此同时也提高了整体控制算法的适用性,保障了系统运行控制的稳定性。In the actual operation of the new energy power supply system, if there is a major change in the operation mode, it will be directly reflected in the system operating short-circuit capacity ratio, so that the system reactive voltage control parameters can be adjusted in real time in combination with the system operating short-circuit capacity ratio. Adjustment, which enables the PI control parameters to be corrected online, ensuring that the overall control can guarantee high precision and fast response speed in the entire time dimension, and at the same time, it also improves the applicability of the overall control algorithm and ensures the stability of the system operation control sex.

根据本发明的实施例的无功电压控制方法和装置可用于控制诸如风电场的新能源场站的无功电压,但不限于此。下面将结合附图详细描述本发明的优选实施例。The reactive voltage control method and device according to the embodiments of the present invention can be used to control the reactive voltage of a new energy station such as a wind farm, but is not limited thereto. Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

图1是示出根据本发明的第一实施例的无功电压控制方法的流程图,图2是示出根据本发明的第二实施例的无功电压控制方法的流程图,图3是示出根据本发明的第三实施例的无功电压控制方法的流程图,图4是新能源场站的供电系统的简化等效电路图。Fig. 1 is a flow chart showing a reactive voltage control method according to a first embodiment of the present invention, Fig. 2 is a flow chart showing a reactive voltage control method according to a second embodiment of the present invention, and Fig. 3 is a flow chart showing A flowchart of a reactive voltage control method according to a third embodiment of the present invention is shown, and FIG. 4 is a simplified equivalent circuit diagram of a power supply system of a new energy station.

根据本发明的实施例,无功电压控制方法可包括步骤S110、S120和S130。According to an embodiment of the present invention, the reactive voltage control method may include steps S110, S120 and S130.

在步骤S110,根据系统运行短路容量以及新能源场站的额定功率确定系统运行短路容量比。In step S110, the operating short-circuit capacity ratio of the system is determined according to the operating short-circuit capacity of the system and the rated power of the new energy station.

如上所述,如果新能源场站的供电系统的运行方式发生较大变化,系统运行短路容量比会随之变化,因此,系统运行短路容量比可以反映出上述变化,结合系统运行短路容量比及时对系统无功电压的控制参数(比例积分控制参数)进行实时调整,这使得比例积分(PI)控制参数(这里的PI控制参数包括PI算法或PI控制器的比例项的系数或常数和积分项的系数或常数,下文称为比例系数和积分系数)可以得到在线修正。As mentioned above, if the operation mode of the power supply system of the new energy station changes greatly, the operating short-circuit capacity ratio of the system will change accordingly. Therefore, the operating short-circuit capacity ratio of the system can reflect the above changes. Real-time adjustment is made to the control parameters (proportional-integral control parameters) of the reactive power and voltage of the system, which makes the proportional-integral (PI) control parameters (the PI control parameters here include coefficients or constants and integral terms of the proportional term of the PI algorithm or PI controller The coefficients or constants, hereinafter referred to as proportional coefficients and integral coefficients) can be corrected online.

系统运行短路容量可基于新能源场站的高压侧或低压侧的电气信息量计算得到。本发明的实施例的无功电压控制方法还可包括获取新能源场站的高压侧或低压侧的电气信息量的步骤以及基于电气信息量计算系统运行短路容量的步骤。这里的新能源场站可以是风电场站或光伏场站,或者包括风力发电机组和/或光伏发电系统的场站。The operating short-circuit capacity of the system can be calculated based on the electrical information of the high-voltage side or low-voltage side of the new energy station. The reactive voltage control method of the embodiment of the present invention may also include the step of obtaining the electrical information of the high-voltage side or the low-voltage side of the new energy station and the step of calculating the operating short-circuit capacity of the system based on the electrical information. The new energy field station here may be a wind farm station or a photovoltaic station, or a station including a wind power generation unit and/or a photovoltaic power generation system.

新能源场站的高压侧或低压侧的电气信息量可通过各种传感器等实时测得。The electrical information of the high-voltage side or low-voltage side of the new energy station can be measured in real time by various sensors.

系统运行短路容量比可以通过系统运行短路容量除以新能源场站的额定功率得到,但不限于此。The system operating short-circuit capacity ratio can be obtained by dividing the system operating short-circuit capacity by the rated power of the new energy station, but is not limited thereto.

在步骤S120,根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数。具体地,可以在系统运行短路容量比在一定范围内变化时,将PI控制参数设置为同一控制参数,即,比例系数不变,积分系数也不变。In step S120, the proportional coefficient and integral coefficient of the proportional-integral algorithm are determined according to the range of the operating short-circuit capacity ratio of the system. Specifically, when the operating short-circuit capacity ratio of the system changes within a certain range, the PI control parameter can be set to the same control parameter, that is, the proportional coefficient and the integral coefficient are also unchanged.

在步骤S130,利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制。具体地,利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制的步骤可包括:以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,计算所述新能源场站的无功源的控制指令,并且向所述无功源下发所述控制指令,以使所述无功电压趋近所述无功电压目标值。In step S130, reactive voltage control is performed using a proportional-integral algorithm based on the determined proportional coefficient and integral coefficient. Specifically, the step of using the proportional-integral algorithm based on the determined proportional coefficient and integral coefficient to control the reactive voltage may include: taking the deviation between the target value of the reactive voltage and the actual reactive voltage as the input of the proportional-integral algorithm, and calculating the new The reactive power source control command of the energy station, and the control command is issued to the reactive power source, so that the reactive voltage approaches the reactive voltage target value.

这里,以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,仅仅是示例,还可以以无功功率与实际无功功率的偏差作为比例积分算法的输入,也可以多个变量共同控制。Here, the deviation between the reactive voltage target value and the actual reactive voltage is used as the input of the proportional integral algorithm. The variables are jointly controlled.

需要说明的是,本发明的PI算法或PI控制器也可以被视为PID算法或PID控制器,其中,微分系数为零。It should be noted that the PI algorithm or PI controller of the present invention can also be regarded as a PID algorithm or a PID controller, wherein the differential coefficient is zero.

获取新能源场站的高压侧或低压侧的电气信息量的步骤可包括:获取不同时刻的电气信息量,具体地,可以获取当前时刻的电气信息量以及上一时刻的电气信息量。在这种情况下,基于电气信息量计算系统运行短路容量的步骤可包括:基于获取的当前时刻的电气信息量以及上一时刻的电气信息量计算系统运行短路容量SkOSCThe step of acquiring the electrical information of the high-voltage side or the low-voltage side of the new energy station may include: acquiring electrical information at different times, specifically, acquiring the electrical information at the current moment and the electrical information at the previous moment. In this case, the step of calculating the system operating short-circuit capacity based on the electrical information may include: calculating the system operating short-circuit capacity S kOSC based on the acquired electrical information at the current moment and the electrical information at the previous moment.

具体地,如图2所示,根据本发明的实施例,无功电压控制方法可包括步骤S210、S220、S230和S240。Specifically, as shown in FIG. 2 , according to an embodiment of the present invention, the reactive voltage control method may include steps S210 , S220 , S230 and S240 .

在步骤S210,获取当前时刻(例如,k时刻)的电气信息量以及上一时刻(例如,k-1时刻)的电气信息量,作为示例,电气信息量可以包括新能源场站的高压侧或低压侧的有功功率、无功功率和电压等。即,可以获取新能源场站的高压侧或低压侧的在当前时刻(例如,k时刻)的电气信息量以及上一时刻(例如,k-1时刻)的电气信息量。In step S210, the electrical information at the current moment (for example, time k) and the electrical information at the previous moment (for example, k-1 time) are acquired. As an example, the electrical information may include the high-voltage side of the new energy station or Active power, reactive power and voltage on the low-voltage side. That is, the amount of electrical information at the current moment (for example, time k) and the amount of electrical information at the previous moment (for example, time k-1) of the high-voltage side or low-voltage side of the new energy station can be obtained.

作为示例,可以根据特定现场通过整定或仿真方式得到系统典型OSCR值,从而通过仿真或实际项目调试得到最佳PI控制参数,这里的最佳PI控制参数可以作为初始值或者默认值。As an example, the typical OSCR value of the system can be obtained through tuning or simulation according to a specific site, so that the optimal PI control parameters can be obtained through simulation or actual project debugging. The optimal PI control parameters here can be used as initial values or default values.

在步骤S220,基于获取的当前时刻的电气信息量以及上一时刻的电气信息量计算系统运行短路容量。In step S220, the operating short-circuit capacity of the system is calculated based on the acquired electrical information at the current moment and the electrical information at the previous moment.

下面将结合图4描述如何基于电气信息量以及新能源场站的额定功率确定系统运行短路容量比。The following will describe how to determine the operating short-circuit capacity ratio of the system based on the amount of electrical information and the rated power of the new energy station in conjunction with Figure 4.

具体地,如图4所示,系统运行时的等效电势为E=Ex+jEy,系统的等效阻抗为Z=R+jX,新能源场站(例如,风电场)主变高压侧的电压幅值为V,有功功率为P,无功功率为Q,系统运行短路容量为SOSCSpecifically, as shown in Figure 4, the equivalent potential of the system during operation is E=E x +jE y , the equivalent impedance of the system is Z=R+jX, and the main transformer of the new energy station (for example, a wind farm) has a high voltage The voltage amplitude on the side is V, the active power is P, the reactive power is Q, and the operating short-circuit capacity of the system is S OSC .

在k时刻,系统的等效电势为Ek=Ekx+jEky,等效阻抗为Zk=Rk+jXk,新能源场站(例如,风电场)主变高压侧的电压幅值为Vk,有功功率为Pk,无功功率为Qk,系统运行短路容量为SkOSCAt time k, the equivalent potential of the system is E k =E kx +jE ky , the equivalent impedance is Z k =R k +jX k , the voltage amplitude of the main transformer high voltage side of the new energy station (for example, wind farm) is V k , the active power is P k , the reactive power is Q k , and the operating short-circuit capacity of the system is S kOSC .

根据有功功率、无功功率和电压可以计算得到系统在k时刻的电流值,具体如下式1所述。According to the active power, reactive power and voltage, the current value of the system at time k can be calculated, as described in Equation 1 below.

Figure BDA0002825435770000061
Figure BDA0002825435770000061

经过整理可以得到下式:After sorting, the following formula can be obtained:

Figure BDA0002825435770000062
Figure BDA0002825435770000062

也即,可以得到下式2:That is, the following formula 2 can be obtained:

Figure BDA0002825435770000063
Figure BDA0002825435770000063

在k-1时刻,系统的等效电势为Ek-1=E(k-1)x+jE(k-1)y,等效阻抗为Zk-1=Rk-1+jXk-1,主变高压侧的电压幅值为Vk-1,有功功率为Pk-1,无功功率为Qk-1At time k-1, the equivalent potential of the system is E k-1 =E (k-1)x +jE (k-1)y , and the equivalent impedance is Z k-1 =R k-1 +jX k- 1. The voltage amplitude on the high voltage side of the main transformer is V k-1 , the active power is P k-1 , and the reactive power is Q k-1 .

进而可以得到如下式3:Then the following formula 3 can be obtained:

Figure BDA0002825435770000071
Figure BDA0002825435770000071

根据系统运行特性,k时刻和k-1时刻有如下式成立:According to the operating characteristics of the system, the following formulas hold for k time and k-1 time:

Figure BDA0002825435770000072
Figure BDA0002825435770000072

其中,Ekx、Eky、E(k-1)x、E(k-1)y分别为k时刻等效电势的实部、k时刻等效电势的虚部、k-1时刻等效电势的实部、k-1时刻等效电势的虚部,Rk、Xk、Rk-1、Xk-1分别为k时刻系统的电阻、k时刻系统的电抗、k-1时刻系统的电阻、k-1时刻系统的电抗,将式(2),式(3),式(4)进行联立,得到式5,进而可对Ekx、Eky、Rk、Xk进行求解,有:Among them, E kx , E ky , E (k-1)x , and E (k-1)y are the real part of the equivalent potential at time k, the imaginary part of the equivalent potential at time k, and the equivalent potential at time k-1 The real part of , the imaginary part of the equivalent potential at time k-1, R k , X k , R k-1 , and X k-1 are the resistance of the system at time k, the reactance of the system at time k, and the Resistance, reactance of the system at time k-1, formula (2), formula (3), formula (4) are combined to obtain formula 5, and then E kx , E ky , R k , X k can be solved, have:

Figure BDA0002825435770000073
Figure BDA0002825435770000073

令:make:

Figure BDA0002825435770000074
Figure BDA0002825435770000074

Figure BDA0002825435770000075
Figure BDA0002825435770000075

Figure BDA0002825435770000076
Figure BDA0002825435770000076

Figure BDA0002825435770000077
Figure BDA0002825435770000077

Figure BDA0002825435770000081
Figure BDA0002825435770000081

|H|=(-VkQ(k-1)+V(k-1)Qk)2+(VkP(k-1)-V(k-1)Pk)2 |H|=(-V k Q (k-1) +V (k-1) Q k ) 2 +(V k P (k-1) -V (k-1) P k ) 2

Figure BDA0002825435770000082
Figure BDA0002825435770000082

|B|=VkV(k-1)(V(k-1)-Vk)(QkQ(k-1)+Q(k-1)Pk)|B|=V k V (k-1) (V (k-1) -V k )(Q k Q (k-1) +Q (k-1) P k )

Figure BDA0002825435770000083
Figure BDA0002825435770000083

Figure BDA0002825435770000084
Figure BDA0002825435770000084

进而求得:And then get:

Figure BDA0002825435770000085
Figure BDA0002825435770000085

由此可得在k时刻系统运行短路容量为:It can be obtained that the operating short-circuit capacity of the system at time k is:

Figure BDA0002825435770000086
Figure BDA0002825435770000086

由于接入系统电压等级一般较高,因此在计算过程中Rk可取0值,那么式(7)式可变化为:Since the voltage level of the access system is generally high, R k can take the value of 0 in the calculation process, then the formula (7) can be changed into:

Figure BDA0002825435770000087
Figure BDA0002825435770000087

需要说明的是,由于接入系统电压等级一般较高,因此在计算过程中Rk可取0值,这是由系统特性决定的。在实际应用中,根据实际需求也选取新能源场站高压侧或低压侧电压和电流值进行系统运行容量计算。It should be noted that since the voltage level of the access system is generally high, Rk can take the value of 0 during the calculation process, which is determined by the system characteristics. In practical applications, the voltage and current values of the high-voltage side or low-voltage side of the new energy station are also selected to calculate the system operating capacity according to actual needs.

由于无功电压控制一般对新能源场站高压母线电压进行控制,因此优选计算点为新能源场站高压侧。Since the reactive voltage control generally controls the high-voltage bus voltage of the new energy station, the optimal calculation point is the high-voltage side of the new energy station.

在步骤S230,根据系统运行短路容量以及新能源场站的额定功率确定系统运行短路容量比。In step S230, the operating short-circuit capacity ratio of the system is determined according to the operating short-circuit capacity of the system and the rated power of the new energy station.

具体地,在k时刻新能源场站的系统运行短路容量比为:Specifically, the system operation short-circuit capacity ratio of the new energy station at time k is:

Figure BDA0002825435770000091
Figure BDA0002825435770000091

Pt=n×Pd (式10)P t =n×P d (Formula 10)

Pt是新能源场站(例如,风电场站)的额定功率,在场站为风电场站时,pd可以是单个风力发电机组的额定功率,n是风电场的风力发电机组的数量。P t is the rated power of a new energy site (for example, a wind farm). When the site is a wind farm, p d can be the rated power of a single wind turbine, and n is the number of wind turbines in the wind farm.

在步骤S240,根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数。In step S240, the proportional coefficient and the integral coefficient of the proportional-integral algorithm are determined according to the range of the operating short-circuit capacity ratio of the system.

在步骤S250,利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制。具体可如上所述,以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,计算所述新能源场站的无功源的控制指令,并且向所述无功源下发所述控制指令,以使无功电压趋近所述无功电压目标值。In step S250, reactive voltage control is performed using a proportional-integral algorithm based on the determined proportional coefficient and integral coefficient. Specifically, as described above, the deviation between the reactive voltage target value and the actual reactive voltage is used as the input of the proportional integral algorithm to calculate the control command of the reactive power source of the new energy station, and issue a command to the reactive power source The control instruction is to make the reactive voltage approach the reactive voltage target value.

根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤(例如,步骤S240)可包括:确定系统运行短路容量比是否有效。The step of determining the proportional coefficient and the integral coefficient of the proportional integral algorithm according to the range of the operating short-circuit capacity ratio of the system (for example, step S240 ) may include: determining whether the operating short-circuit capacity ratio of the system is valid.

作为示例,响应于系统运行短路容量比大于预定阈值(例如,下文提及的第三预定值n3),确定系统运行短路容量比有效。响应于系统运行短路容量比小于等于第三预定值,确定系统运行短路容量比无效。As an example, in response to the system operating short circuit capacity ratio being greater than a predetermined threshold (eg, the third predetermined value n3 mentioned below), it is determined that the system operating short circuit capacity ratio is valid. In response to the system operating short circuit capacity ratio being less than or equal to the third predetermined value, it is determined that the system operating short circuit capacity ratio is invalid.

因此,根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤(例如,步骤S240)可包括响应于系统运行短路容量比大于预定阈值(例如,下文提及的第三预定值n3),确定系统运行短路容量比有效的步骤。Therefore, the step of determining the proportional coefficient and the integral coefficient of the proportional-integral algorithm according to the range in which the operating short-circuit capacity ratio of the system is located (for example, step S240) may include responding to the operating short-circuit capacity ratio of the system being greater than a predetermined threshold (for example, the first mentioned below 3. Predetermined value n3), the effective step of determining the operating short-circuit capacity ratio of the system.

一般情况下,系统运行短路容量比不会小于等于第三预定值。如果出现极端情况,可以保持PI控制参数,通过其他的方式对无功电压进行控制。Generally, the operating short-circuit capacity ratio of the system will not be less than or equal to the third predetermined value. If there is an extreme situation, the PI control parameters can be kept, and the reactive voltage can be controlled by other methods.

根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤(例如,步骤S240)可包括或者还可包括:当系统运行短路容量比处在不同的范围时,确定不同的比例系数和不同的积分系数。The step of determining the proportional coefficient and the integral coefficient of the proportional-integral algorithm according to the range of the operating short-circuit capacity ratio of the system (for example, step S240) may include or may further include: when the operating short-circuit capacity ratio of the system is in a different range, determine different proportional coefficients and different integral coefficients.

可以在系统运行短路容量比在一定范围内变化时,将PI控制参数设置为同一控制参数,即,比例系数不变,积分系数也不变。当系统运行短路容量比在另一范围变化时,可以将PI控制参数设置为另一控制参数。When the operating short-circuit capacity ratio of the system changes within a certain range, the PI control parameters can be set to the same control parameters, that is, the proportional coefficient and the integral coefficient remain unchanged. When the operating short-circuit capacity ratio of the system changes in another range, the PI control parameter can be set as another control parameter.

下面将结合图3描述根据PI控制参数所处的范围对PI控制参数进行分段控制的流程图。根据系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤(例如,步骤S240)可包括步骤S2401、S2402、S2403和S2404。The following will describe a flow chart of segmented control of PI control parameters according to the ranges of the PI control parameters in conjunction with FIG. 3 . The step of determining the proportional coefficient and the integral coefficient of the proportional-integral algorithm (for example, step S240 ) according to the range of the operating short-circuit capacity ratio of the system may include steps S2401 , S2402 , S2403 and S2404 .

如图3所示,在步骤S2401,可以判断系统运行短路容量比(OSCR)是否大于第一预定值(n1),如果OSCR大于第一预定值,则可以采用第一组PI参数(或称为PI控制参数),其中,n1可以大于或等于5,可以根据工程应用进行整定,经过实际工程应用,优选推荐值为5。As shown in Figure 3, in step S2401, it can be judged whether the system operating short-circuit capacity ratio (OSCR) is greater than the first predetermined value (n1), if OSCR is greater than the first predetermined value, then the first set of PI parameters (or called PI control parameters), where n1 can be greater than or equal to 5, and can be set according to engineering applications. After actual engineering applications, the preferred recommended value is 5.

具体地,当系统运行短路容量比大于第一预定值(n1)时,可确定比例积分算法的比例系数和积分系数分别为第一比例系数和第一积分系数。换言之,当系统运行短路容量比在大于第一预定值的范围内变化时,可以将比例系数保持为第一比例系数,并且将积分系数保持为第一积分系数。Specifically, when the operating short-circuit capacity ratio of the system is greater than the first predetermined value (n1), the proportional coefficient and the integral coefficient of the proportional-integral algorithm may be determined to be the first proportional coefficient and the first integral coefficient, respectively. In other words, when the operating short-circuit capacity ratio of the system changes within a range larger than the first predetermined value, the proportional coefficient can be kept as the first proportional coefficient, and the integral coefficient can be kept as the first integral coefficient.

在步骤S2402,当n1≥OSCR>n2(第二预定值)时,则可以采用第二组PI参数,这里,n1>n2≥3,可以根据工程应用进行整定,经过实际工程应用,n2的优选推荐值为3。In step S2402, when n1≥OSCR>n2 (the second predetermined value), the second set of PI parameters can be used. Here, n1>n2≥3 can be set according to engineering applications. After actual engineering applications, the optimal value of n2 The recommended value is 3.

具体地,当系统运行短路容量比大于第二预定值(n2)并且小于等于第一预定值(n1)时,可确定比例积分算法的比例系数和积分系数分别为第二比例系数和第二积分系数。Specifically, when the operating short-circuit capacity ratio of the system is greater than the second predetermined value (n2) and less than or equal to the first predetermined value (n1), it can be determined that the proportional coefficient and integral coefficient of the proportional-integral algorithm are the second proportional coefficient and the second integral coefficient.

换言之,当系统运行短路容量比在大于第二预定值并且小于等于第一预定值的范围内变化时,可以将比例系数保持为第二比例系数,并且将积分系数保持为第二积分系数。In other words, when the operating short-circuit capacity ratio of the system varies within the range greater than the second predetermined value and less than or equal to the first predetermined value, the proportional coefficient can be kept as the second proportional coefficient, and the integral coefficient can be kept as the second integral coefficient.

在步骤S2403,当n2≥OSCR>n3(第三预定值),则可以采用第三组PI参数,这里,n3可以大于或等于2,n3可以根据工程应用进行整定,经过实际工程应用,优选推荐值为2。In step S2403, when n2≥OSCR>n3 (the third predetermined value), the third group of PI parameters can be used. Here, n3 can be greater than or equal to 2, and n3 can be set according to engineering applications. After actual engineering applications, it is recommended The value is 2.

当系统运行短路容量比大于第三预定值(n3)并且小于等于第二预定值(n2)时,可确定比例积分算法的比例系数和积分系数分别为第三比例系数和第三积分系数。When the system operating short-circuit capacity ratio is greater than the third predetermined value (n3) and less than or equal to the second predetermined value (n2), the proportional coefficient and integral coefficient of the proportional integral algorithm can be determined to be the third proportional coefficient and the third integral coefficient respectively.

换言之,当系统运行短路容量比在第三预定值并且小于等于第二预定值的范围内变化时,可以将比例系数保持为第三比例系数,并且将积分系数保持为第三积分系数。In other words, when the operating short-circuit capacity ratio of the system changes within the range between the third predetermined value and less than or equal to the second predetermined value, the proportional coefficient can be kept as the third proportional coefficient, and the integral coefficient can be kept as the third integral coefficient.

第一比例系数、第二比例系数、第三比例系数、第一积分系数、第二积分系数和第三积分系数可以是OSCR在对应范围内的最佳PI控制参数,均可被预先确定。The first proportional coefficient, the second proportional coefficient, the third proportional coefficient, the first integral coefficient, the second integral coefficient and the third integral coefficient may be optimal PI control parameters of the OSCR within a corresponding range, and may be predetermined.

在步骤S2404,当系统运行短路容量比小于等于第三预定值n3时,可以保持PI参数不同。In step S2404, when the operating short-circuit capacity ratio of the system is less than or equal to the third predetermined value n3, the PI parameters may be kept different.

在步骤S250,利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制,具体地,可以以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,计算新能源场站的无功源的控制指令,并且向无功源下发控制指令,以使所述无功电压趋近无功电压目标值。In step S250, the proportional integral algorithm based on the determined proportional coefficient and integral coefficient is used for reactive voltage control. Specifically, the deviation between the target value of reactive voltage and the actual reactive voltage can be used as the input of the proportional integral algorithm to calculate the new energy The control command of the reactive power source of the station, and sends the control command to the reactive power source, so that the reactive voltage approaches the reactive voltage target value.

根据本发明的实施例的无功电压控制方法和装置可基于系统运行短路容量比(OSCR)所处的范围,分段调整或控制比例积分(PI)控制参数,从而实时调整PI控制参数,提高无功电压的控制精度和调整速度。The reactive voltage control method and device according to the embodiments of the present invention can adjust or control proportional-integral (PI) control parameters in sections based on the range of the operating short-circuit capacity ratio (OSCR) of the system, thereby adjusting the PI control parameters in real time to improve Reactive voltage control accuracy and adjustment speed.

目前的无功电压控制多采用固定的控制方式,也即系统控制定值参数不能随系统的运行方式变化而即时修正,这导致在系统运行方式发生变化时,采用固有定值的无功电压控制系统不能及时感知系统变化,这使得场站在无功电压控制在当前时间断面下控制效果很好,但一旦系统运行方式发生变化,整体控制效果便不再理想,而且更为严重的是,系统运行方式发生的变化越大,整体控制效果越差,而系统运行方式的变化在系统中极为常见,这给整体控制在整个时间维度下均满足控制要求带来极大困难,导致无功电压在控制过程和目标上不能达到预期的效果,最终无法从根本上提高电压控制的合格率。The current reactive power and voltage control mostly adopts a fixed control method, that is, the system control fixed value parameters cannot be corrected immediately with the change of the system operation mode, which leads to the use of fixed value reactive voltage control when the system operation mode changes. The system cannot sense system changes in time, which makes the control effect of reactive power and voltage control of the station very good under the current time section, but once the system operation mode changes, the overall control effect is no longer ideal, and more seriously, the system The greater the change in the operation mode, the worse the overall control effect, and the change in the system operation mode is very common in the system, which brings great difficulties to the overall control to meet the control requirements in the entire time dimension, resulting in reactive voltage in the The expected effect cannot be achieved on the control process and goals, and ultimately the qualified rate of voltage control cannot be fundamentally improved.

根据本发明的实施例的无功电压控制方法,可以在线实时调整PI控制参数,控制速率、控制精度以及控制效果均优于目前的采样固定控制方式的无功电压控制策略。According to the reactive voltage control method of the embodiment of the present invention, the PI control parameters can be adjusted in real time online, and the control rate, control accuracy and control effect are all better than the current reactive voltage control strategy of sampling fixed control mode.

图5是示出根据本发明的第一实施例的无功电压控制装置的框图,图6是示出根据本发明的第二实施例的无功电压控制装置的框图。FIG. 5 is a block diagram showing a reactive voltage control device according to a first embodiment of the present invention, and FIG. 6 is a block diagram showing a reactive voltage control device according to a second embodiment of the present invention.

根据本发明的实施例,无功电压控制装置400可包括系统运行短路容量比确定模块410、系数确定模块420和无功电压控制模块430。无功电压控制装置400还可包括检测模块401以及计算模块402。According to an embodiment of the present invention, the reactive voltage control device 400 may include a system operation short circuit capacity ratio determination module 410 , a coefficient determination module 420 and a reactive voltage control module 430 . The reactive voltage control device 400 may also include a detection module 401 and a calculation module 402 .

系统运行短路容量比确定模块410可以根据系统运行短路容量以及新能源场站的额定功率计算系统运行短路容量比。系统运行短路容量以及系统运行短路容量比的计算方式可如上所述,这里不再赘述。另外,需要说明的是,上述计算系统运行短路容量及系统运行短路容量比的方式仅仅是示例,本发明不限于此。The system operating short-circuit capacity ratio determination module 410 can calculate the system operating short-circuit capacity ratio according to the system operating short-circuit capacity and the rated power of the new energy station. The calculation methods of the system operating short-circuit capacity and the system operating short-circuit capacity ratio can be described above, and will not be repeated here. In addition, it should be noted that the above method of calculating the system operating short-circuit capacity and the system operating short-circuit capacity ratio is only an example, and the present invention is not limited thereto.

系数确定模块420可以确定系统运行短路容量比是否有效。如果系统运行短路容量比有效,则可以采用分段控制方式进行控制。如果系统运行短路容量比无效,则可以保持PI控制参数或者采用其他控制策略。The coefficient determination module 420 can determine whether the system operating short circuit capacity ratio is valid. If the short-circuit capacity ratio of the system is effective, it can be controlled by segmented control. If the short-circuit capacity ratio of the system is invalid, the PI control parameters can be maintained or other control strategies can be adopted.

系数确定模块420可以响应于系统运行短路容量比大于预定阈值,确定系统运行短路容量比有效。The coefficient determining module 420 may determine that the system operating short circuit capacity ratio is valid in response to the system operating short circuit capacity ratio being greater than a predetermined threshold.

系数确定模块420可以根据系统运行短路容量比所处的范围确定比例积分控制器的比例系数和积分系数,具体地,系数确定模块420可以响应于系统运行短路容量比处在不同的范围而确定不同的比例系数和不同的积分系数,也可以响应于系统运行短路容量比在某一连续范围内变化,而将PI控制参数保持为不变。The coefficient determination module 420 can determine the proportional coefficient and integral coefficient of the proportional-integral controller according to the range of the operating short-circuit capacity ratio of the system. Specifically, the coefficient determination module 420 can determine different The proportional coefficient and different integral coefficients can also keep the PI control parameters constant in response to the system operating short-circuit capacity ratio changing within a certain continuous range.

可以实时检测电气信息量,或者从其他模块接收电气信息量。It is possible to detect the amount of electrical information in real time, or receive the amount of electrical information from other modules.

作为示例,无功电压控制装置400还可包括检测模块401和计算模块402,检测模块401可以获取新能源场站的高压侧或低压侧的电气信息量,计算模块402可以基于电气信息量计算系统运行短路容量。检测模块401可以包括各种传感器,计算模块402、系数确定模块420、系统运行短路容量比确定模块410均可通过软件和/或硬件实现。As an example, the reactive power and voltage control device 400 may also include a detection module 401 and a calculation module 402. The detection module 401 can obtain the electrical information of the high-voltage side or the low-voltage side of the new energy station, and the calculation module 402 can be based on the electrical information calculation system. Operating short circuit capacity. The detection module 401 may include various sensors, and the calculation module 402, the coefficient determination module 420, and the system operation short-circuit capacity ratio determination module 410 can all be realized by software and/or hardware.

作为示例,检测模块401可以获取当前时刻(例如,k时刻)的电气信息量以及上一时刻(例如,k-1时刻)的电气信息量,计算模块402可以基于获取的当前时刻的电气信息量以及上一时刻的电气信息量计算系统运行短路容量。As an example, the detection module 401 can obtain the electrical information amount at the current moment (for example, k moment) and the electrical information amount at the previous moment (for example, k-1 moment), and the calculation module 402 can be based on the obtained electrical information amount at the current moment And the amount of electrical information at the last moment is used to calculate the operating short-circuit capacity of the system.

具体的计算方式如上所述,可以根据新能源场站的高压侧或低压侧的有功功率、无功功率、电压等电气信息量计算系统运行短路容量以及系统运行短路容量比。The specific calculation method is as described above. The system operating short-circuit capacity and the system operating short-circuit capacity ratio can be calculated according to the electrical information such as active power, reactive power, and voltage of the high-voltage side or low-voltage side of the new energy station.

系数确定模块420可以响应于系统运行短路容量比大于第一预定值,确定比例积分控制器的比例系数和积分系数分别为第一比例系数和第一积分系数。也即,如果OSCR大于第一预定值,则系数确定模块420可以采用第一组PI参数。换言之,当系统运行短路容量比在大于第一预定值的范围内变化时,系数确定模块420可以将比例系数保持为第一比例系数,并且将积分系数保持为第一积分系数。The coefficient determining module 420 may determine the proportional coefficient and the integral coefficient of the proportional-integral controller as the first proportional coefficient and the first integral coefficient respectively in response to the system operating short-circuit capacity ratio being greater than the first predetermined value. That is, if the OSCR is greater than the first predetermined value, the coefficient determination module 420 may employ the first set of PI parameters. In other words, when the operating short-circuit capacity ratio of the system changes within a range greater than the first predetermined value, the coefficient determination module 420 may maintain the proportional coefficient as the first proportional coefficient and maintain the integral coefficient as the first integral coefficient.

系数确定模块420可以响应于系统运行短路容量比大于第二预定值并且小于等于第一预定值,确定比例积分控制器的比例系数和积分系数分别为第二比例系数和第二积分系数。The coefficient determination module 420 may determine the proportional coefficient and the integral coefficient of the proportional-integral controller as the second proportional coefficient and the second integral coefficient respectively in response to the system operating short-circuit capacity ratio being greater than the second predetermined value and less than or equal to the first predetermined value.

也就是说,当n1≥OSCR>n2(第二预定值)时,则系数确定模块420可以采用第二组PI参数。即,当系统运行短路容量比在大于第二预定值并且小于等于第一预定值的范围内变化时,系数确定模块420可以将比例系数保持为第二比例系数,并且将积分系数保持为第二积分系数。That is to say, when n1≧OSCR>n2 (the second predetermined value), the coefficient determination module 420 can adopt the second set of PI parameters. That is, when the operating short-circuit capacity ratio of the system changes within a range greater than the second predetermined value and less than or equal to the first predetermined value, the coefficient determination module 420 may maintain the proportional coefficient as the second proportional coefficient, and maintain the integral coefficient as the second Integral factor.

系数确定模块420可以响应于系统运行短路容量比大于第三预定值并且小于等于第二预定值,确定比例积分控制器的比例系数和积分系数分别为第三比例系数和第三积分系数。The coefficient determining module 420 may determine the proportional coefficient and the integral coefficient of the proportional-integral controller as the third proportional coefficient and the third integral coefficient respectively in response to the system operating short-circuit capacity ratio being greater than the third predetermined value and less than or equal to the second predetermined value.

也就是说,如果n2≥OSCR>n3(第三预定值),则系数确定模块420可以采用第三组PI参数。即,当系统运行短路容量比在第三预定值并且小于等于第二预定值的范围内变化时,系数确定模块420可以将比例系数保持为第三比例系数,并且将积分系数保持为第三积分系数。That is, if n2≧OSCR>n3 (the third predetermined value), the coefficient determination module 420 can adopt the third set of PI parameters. That is, when the operating short-circuit capacity ratio of the system changes within the range of the third predetermined value and less than or equal to the second predetermined value, the coefficient determination module 420 may maintain the proportional coefficient as the third proportional coefficient, and maintain the integral coefficient as the third integral coefficient.

无功电压控制模块430可以利用基于确定的比例系数和积分系数的比例积分控制器进行无功电压控制,这里的比例积分控制器控制器无功电压控制模块430的一部分。The reactive voltage control module 430 may use a proportional integral controller based on the determined proportional coefficient and integral coefficient to perform reactive voltage control, where the proportional integral controller controls a part of the reactive voltage control module 430 .

具体地,无功电压控制模块430可以以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,计算新能源场站的无功源的控制指令,并且向无功源下发所述控制指令,以使无功电压趋近无功电压目标值。Specifically, the reactive voltage control module 430 can use the deviation between the target value of reactive voltage and the actual reactive voltage as the input of the proportional integral algorithm, calculate the control command of the reactive power source of the new energy station, and issue the command to the reactive power source The control instruction is to make the reactive voltage approach the target value of the reactive voltage.

上述步骤的各个操作可被编写为软件程序或指令,因此,根据本发明的示例性实施例的前馈控制方法可经由软件实现,本发明的示例性实施例的计算机可读存储介质可存储有计算机程序,当所述计算机程序被处理器执行时实现如上述示例性实施例所述的无功电压控制方法。The various operations of the above steps can be written as software programs or instructions, therefore, the feedforward control method according to the exemplary embodiment of the present invention can be implemented via software, and the computer-readable storage medium of the exemplary embodiment of the present invention can store A computer program, when the computer program is executed by a processor, implements the reactive voltage control method as described in the above exemplary embodiments.

根据本公开的各个实施例,装置(例如模块或它们的功能)或方法可以通过存储在计算机可读存储介质中的程序或指令来实现。在该指令被处理器执行的情况下,处理器可以执行对应于该指令的功能或执行对应于该指令的方法。模块的至少一部分可以由处理器实现(例如,执行)。编程模块的至少一部分可以包括用于执行至少一个功能的模块、程序、例程、指令集和过程。在一个示例中,指令或软件包括由一个或更多个处理器或计算机直接执行的机器代码(诸如,由编译器产生的机器代码)。在另一示例中,指令或软件包括由一个或更多个处理器或计算机使用解释器执行的更高级代码。可基于附图中示出的框图和流程图以及说明书中的相应描述使用任何编程语言来编写指令或软件。According to various embodiments of the present disclosure, means (such as modules or their functions) or methods may be implemented by programs or instructions stored in computer-readable storage media. When the instruction is executed by the processor, the processor may perform the function corresponding to the instruction or execute the method corresponding to the instruction. At least a portion of a module may be implemented (eg, executed) by a processor. At least a portion of the programming modules may include modules, programs, routines, sets of instructions, and procedures for performing at least one function. In one example, instructions or software include machine code (such as that produced by a compiler) for direct execution by one or more processors or computers. In another example, instructions or software comprise higher-level code that is executed by one or more processors or computers using an interpreter. Instructions or software may be written using any programming language based on the block diagrams and flowcharts shown in the drawings and the corresponding descriptions in the specification.

计算机可读存储介质包括诸如软盘和磁带的磁介质、光介质(包括光盘(CD)ROM和DVD ROM)、诸如软式光盘的磁光介质、设计用于存储和执行程序命令的诸如ROM、RAM的硬件装置以及闪速存储器。所述程序命令包括由计算机使用解释器可执行的语言代码以及由编译器产生的机器语言代码。上述的硬件装置可以通过用于执行本公开的各个实施例的操作的一个或更多个软件模块来实现。Computer-readable storage media include magnetic media such as floppy disks and magnetic tapes, optical media (including compact disc (CD) ROMs and DVD ROMs), magneto-optical media such as floppy disks, devices such as ROM, RAM, etc. designed to store and execute program commands hardware device and flash memory. The program commands include language codes executable by a computer using an interpreter and machine language codes generated by a compiler. The above-described hardware devices may be realized by one or more software modules for performing operations of various embodiments of the present disclosure.

本公开的模块或编程模块可以包括在省略一些部件或添加其它部件的情况下前述部件中的至少一个。所述模块、编程模块或者其它部件的操作可以顺序执行、并行执行、循环执行或试探执行。此外,一些操作可以以不同的顺序执行、可被省略或用其他操作进行扩展。A module or programming module of the present disclosure may include at least one of the aforementioned components with some components omitted or other components added. The operations of the modules, programming modules, or other components may be performed sequentially, in parallel, in a loop, or heuristically. Additionally, some operations may be performed in a different order, omitted, or augmented with other operations.

本发明的示例性实施例的计算机可读存储介质和/或无功电压控制装置可以是计算装置、控制器或控制系统的一部分。The computer-readable storage medium and/or the reactive voltage control device of the exemplary embodiments of the present invention may be part of a computing device, a controller, or a control system.

例如,根据本发明的示例性实施例可提供一种计算装置,该计算装置可包括:处理器(未示出)和存储器(未示出,可以是计算机可读存储介质),其中,存储器存储有计算机程序(代码或指令),当所述计算机程序被处理器执行时,实现如上述示例性实施例所述的无功电压控制方法。For example, an exemplary embodiment of the present invention may provide a computing device, which may include: a processor (not shown) and a memory (not shown, which may be a computer-readable storage medium), wherein the memory stores There is a computer program (code or instruction), and when the computer program is executed by the processor, the reactive voltage control method as described in the above exemplary embodiments is realized.

根据本发明的实施例的无功电压控制方法和无功电压控制装置,可以在线实时调整PI控制参数,提高了无功电压控制的控制速率、控制精度等。According to the reactive voltage control method and reactive voltage control device of the embodiments of the present invention, PI control parameters can be adjusted in real time online, and the control speed and control accuracy of reactive voltage control are improved.

虽然已表示和描述了本发明的一些示例性实施例,但本领域技术人员应该理解,在不脱离由权利要求及其等同物限定其范围的本发明的原理和精神的情况下,可以对这些实施例进行修改,例如,可以将不同实施例的技术特征进行组合。While a few exemplary embodiments of the present invention have been shown and described, it should be understood by those skilled in the art that such modifications may be made without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents. Embodiments are modified, for example, technical features of different embodiments may be combined.

Claims (10)

1.一种无功电压控制方法,其特征在于,包括:1. A reactive voltage control method, characterized in that, comprising: 根据系统运行短路容量与新能源场站的额定功率的比值确定系统运行短路容量比;Determine the system operating short-circuit capacity ratio according to the ratio of the system operating short-circuit capacity to the rated power of the new energy station; 根据所述系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数;Determine the proportional coefficient and integral coefficient of the proportional-integral algorithm according to the range in which the operating short-circuit capacity ratio of the system is located; 利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制,The reactive power voltage control is performed using the proportional-integral algorithm based on the determined proportional coefficient and integral coefficient, 其中,所述系统运行短路容量为所述新能源场站的系统在运行时的短路容量,Wherein, the operating short-circuit capacity of the system is the short-circuit capacity of the system of the new energy station during operation, 其中,所述系统运行短路容量比为所述系统的运行短路比,Wherein, the operating short-circuit capacity ratio of the system is the operating short-circuit ratio of the system, 其中,根据所述系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤包括:Wherein, the step of determining the proportional coefficient and the integral coefficient of the proportional integral algorithm according to the range in which the operating short-circuit capacity ratio of the system is located includes: 当所述系统运行短路容量比大于第一预定值时,确定比例积分算法的比例系数和积分系数分别为第一比例系数和第一积分系数,When the operating short-circuit capacity ratio of the system is greater than the first predetermined value, determine the proportional coefficient and the integral coefficient of the proportional integral algorithm as the first proportional coefficient and the first integral coefficient respectively, 当所述系统运行短路容量比大于第二预定值并且小于等于第一预定值时,确定比例积分算法的比例系数和积分系数分别为第二比例系数和第二积分系数,When the operating short-circuit capacity ratio of the system is greater than the second predetermined value and less than or equal to the first predetermined value, the proportional coefficient and the integral coefficient of the proportional integral algorithm are determined to be the second proportional coefficient and the second integral coefficient respectively, 当所述系统运行短路容量比大于第三预定值并且小于等于第二预定值时,确定比例积分算法的比例系数和积分系数分别为第三比例系数和第三积分系数,When the operating short-circuit capacity ratio of the system is greater than the third predetermined value and less than or equal to the second predetermined value, the proportional coefficient and the integral coefficient of the proportional integral algorithm are determined to be the third proportional coefficient and the third integral coefficient respectively, 其中,所述第一预定值大于所述第二预定值,所述第二预定值大于所述第三预定值,所述第二预定值为3。Wherein, the first predetermined value is greater than the second predetermined value, the second predetermined value is greater than the third predetermined value, and the second predetermined value is 3. 2.根据权利要求1所述的无功电压控制方法,其特征在于,还包括:2. The reactive voltage control method according to claim 1, further comprising: 获取新能源场站的高压侧或低压侧的电气信息量;Obtain the electrical information of the high-voltage side or low-voltage side of the new energy station; 基于所述电气信息量计算所述系统运行短路容量。The operating short-circuit capacity of the system is calculated based on the amount of electrical information. 3.根据权利要求2所述的无功电压控制方法,其特征在于,3. The reactive voltage control method according to claim 2, characterized in that, 获取新能源场站的高压侧或低压侧的电气信息量的步骤包括:获取新能源场站的高压侧或低压侧的在当前时刻的电气信息量以及上一时刻的电气信息量,所述电气信息量包括有功功率、无功功率和电压;The step of obtaining the electrical information of the high-voltage side or the low-voltage side of the new energy station includes: obtaining the electrical information of the high-voltage side or the low-voltage side of the new energy station at the current moment and the electrical information of the previous moment. The amount of information includes active power, reactive power and voltage; 基于所述电气信息量计算系统运行短路容量的步骤包括:基于获取的当前时刻的电气信息量以及上一时刻的电气信息量计算系统运行短路容量。The step of calculating the operating short-circuit capacity of the system based on the amount of electrical information includes: calculating the operating short-circuit capacity of the system based on the acquired electrical information amount at the current moment and the amount of electrical information at the previous moment. 4.根据权利要求1至3中任一项所述的无功电压控制方法,其特征在于,根据所述系统运行短路容量比所处的范围确定比例积分算法的比例系数和积分系数的步骤还包括:响应于所述系统运行短路容量比大于预定阈值,确定所述系统运行短路容量比有效。4. The reactive voltage control method according to any one of claims 1 to 3, characterized in that the step of determining the proportional coefficient and the integral coefficient of the proportional integral algorithm according to the range in which the operating short-circuit capacity ratio of the system is located is further The method includes: determining that the system operating short-circuit capacity ratio is valid in response to the system operating short-circuit capacity ratio being greater than a predetermined threshold. 5.根据权利要求1所述的无功电压控制方法,其特征在于,利用基于确定的比例系数和积分系数的比例积分算法进行无功电压控制的步骤包括:以无功电压目标值与实际无功电压的偏差作为比例积分算法的输入,计算所述新能源场站的无功源的控制指令,并且向所述无功源下发所述控制指令,以使所述无功电压趋近所述无功电压目标值。5. The reactive voltage control method according to claim 1, characterized in that, the step of using the proportional-integral algorithm based on the determined proportional coefficient and integral coefficient to carry out reactive voltage control comprises: using the reactive voltage target value and the actual reactive voltage The deviation of the work voltage is used as the input of the proportional integral algorithm to calculate the control command of the reactive power source of the new energy station, and issue the control command to the reactive power source so that the reactive power voltage approaches the desired value. The reactive voltage target value mentioned above. 6.一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有指令或代码,当所述指令或代码由处理器执行时实现根据权利要求1至5中的任一项所述的无功电压控制方法。6. A computer-readable storage medium, characterized in that the computer-readable storage medium stores instructions or codes, and when the instructions or codes are executed by a processor, any one of claims 1 to 5 is implemented. The reactive voltage control method described above. 7.一种无功电压控制装置,其特征在于,包括:7. A reactive voltage control device, characterized in that it comprises: 系统运行短路容量比确定模块,被配置为根据系统运行短路容量与新能源场站的额定功率的比值计算系统运行短路容量比;The system operating short-circuit capacity ratio determination module is configured to calculate the system operating short-circuit capacity ratio according to the ratio of the system operating short-circuit capacity to the rated power of the new energy station; 系数确定模块,被配置为根据所述系统运行短路容量比所处的范围确定比例积分控制器的比例系数和积分系数;The coefficient determination module is configured to determine the proportional coefficient and the integral coefficient of the proportional-integral controller according to the range in which the operating short-circuit capacity ratio of the system is located; 无功电压控制模块,被配置为利用基于确定的比例系数和积分系数的比例积分控制器进行无功电压控制,a reactive voltage control module configured to perform reactive voltage control using a proportional integral controller based on the determined proportional and integral coefficients, 其中,所述系统运行短路容量为所述新能源场站的系统在运行时的短路容量,Wherein, the operating short-circuit capacity of the system is the short-circuit capacity of the system of the new energy station during operation, 其中,所述系统运行短路容量比为所述系统的运行短路比,Wherein, the operating short-circuit capacity ratio of the system is the operating short-circuit ratio of the system, 其中,所述系数确定模块被进一步配置为:Wherein, the coefficient determination module is further configured as: 响应于所述系统运行短路容量比大于第一预定值,确定比例积分控制器的比例系数和积分系数分别为第一比例系数和第一积分系数;In response to the operating short-circuit capacity ratio of the system being greater than a first predetermined value, determining the proportional coefficient and the integral coefficient of the proportional-integral controller to be the first proportional coefficient and the first integral coefficient respectively; 响应于所述系统运行短路容量比大于第二预定值并且小于等于第一预定值,确定比例积分控制器的比例系数和积分系数分别为第二比例系数和第二积分系数;In response to the system operating short-circuit capacity ratio being greater than a second predetermined value and less than or equal to a first predetermined value, determining the proportional coefficient and integral coefficient of the proportional-integral controller to be a second proportional coefficient and a second integral coefficient, respectively; 响应于所述系统运行短路容量比大于第三预定值并且小于等于第二预定值,确定比例积分控制器的比例系数和积分系数分别为第三比例系数和第三积分系数,In response to the system operating short-circuit capacity ratio being greater than a third predetermined value and less than or equal to a second predetermined value, determining the proportional coefficient and integral coefficient of the proportional-integral controller to be a third proportional coefficient and a third integral coefficient, respectively, 其中,所述第一预定值大于所述第二预定值,所述第二预定值大于所述第三预定值,所述第二预定值为3。Wherein, the first predetermined value is greater than the second predetermined value, the second predetermined value is greater than the third predetermined value, and the second predetermined value is 3. 8.根据权利要求7所述的无功电压控制装置,其特征在于,还包括:8. The reactive voltage control device according to claim 7, further comprising: 检测模块,被配置为获取新能源场站的高压侧或低压侧的电气信息量;The detection module is configured to obtain the electrical information of the high-voltage side or the low-voltage side of the new energy station; 计算模块,被配置为基于所述电气信息量计算所述系统运行短路容量。A calculation module configured to calculate the operating short-circuit capacity of the system based on the electrical information. 9.根据权利要求7或8所述的无功电压控制装置,其特征在于,所述系数确定模块被进一步配置为:响应于所述系统运行短路容量比大于预定阈值,确定所述系统运行短路容量比有效。9. The reactive power voltage control device according to claim 7 or 8, wherein the coefficient determining module is further configured to: determine that the system operating short circuit capacity ratio is greater than a predetermined threshold Capacity ratio is effective. 10.一种计算装置,其特征在于,包括:计算机可读存储介质以及处理器,所述计算机可读存储介质存储有指令或代码,当所述指令或代码由所述处理器执行时实现根据权利要求1至5中任一项所述的无功电压控制方法。10. A computing device, characterized in that it comprises: a computer-readable storage medium and a processor, the computer-readable storage medium stores instructions or codes, and when the instructions or codes are executed by the processor, the The reactive voltage control method according to any one of claims 1 to 5.
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