Coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection

A technology of real-time scheduling and coordinated control, applied in photovoltaic power generation, single-grid parallel feeding arrangement, etc., can solve problems such as being unsuitable for grid active power scheduling and control research, and achieve the effect of improving dynamic adjustment capabilities and optimizing adjustment methods.

Active Publication Date: 2012-06-20
NARI TECH CO LTD +1
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Problems solved by technology

The point of view of the article is not suitable for the research on active power dispatching a

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  • Coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection
  • Coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection
  • Coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection

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[0040] A coordinated control method adapted to real-time dispatch and AGC after large-scale photovoltaic grid connection is characterized in that it includes the following steps:

[0041] (1) Coordination and cooperation method between real-time scheduling and AGC: The method of real-time scheduling adopting plan value issuance or directly issuance of remote adjustment instructions is different from the issuance of AGC remote control instructions. The coordination and cooperation method between real-time scheduling and AGC can be It is achieved in the following three ways.

[0042] 1) The real-time power generation plan is issued separately, and some AGC units are deployed as real-time dispatching units to execute the real-time power generation plan, and the remaining AGC units still execute AGC control commands;

[0043] 2), AGC unit base point power P B And regulating power P R , AGC unit base point power P B As a real-time power generation plan, the AGC unit adjusts the power P R ...

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Abstract

The invention discloses a coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection. The coordinate control method comprises the following specific methods of: (1) a coordinate and match method of real time scheduling and AGC; (2) a coordinate control method of real time scheduling and AGC command 'reverse scheduling': determining occurrence of the real time scheduling and AGC 'reverse scheduling' by judging three factors, such as system frequency, adjusting direction and adjusting volume to cope with difficulty in frequency modulation and resource waste by way of locking a scheduling plan; and (3) a coordinate control method for transitional mutual conversion between real time scheduling and AGC adjusting volume: after active adjustment process of AGC is finished, output adjustment is carried out by real time scheduling to recover the maximum adjusting volume of an AGC unit. The coordinate control method disclosed by the invention has the advantages of sufficiently utilizing adjusting resources inside a power grid, optimizing a resource adjusting manner inside the power grid, and ensuring that scheduling and control commands reflect the active power adjusting requirement of the power grid at real time, thereby enhancing the dynamic adjusting capacity of the power grid to resist active disturbance photovoltaic grid connection, and further expressing the proficiency of real time scheduling and AGC coordinate control.

Description

technical field [0001] The invention belongs to the field of power system control, and in particular relates to a coordinated control method adapted to real-time scheduling and AGC after large-scale photovoltaic grid connection. Background technique [0002] Photovoltaic power generation has the characteristics of volatility, intermittence and "positive peak regulation". At the same time, photovoltaic power generation is different from conventional energy sources in frequency regulation, voltage regulation and backup characteristics, which affects the safety and stability of the power grid and the economy of operation. At present, the planning and construction of large-scale photovoltaic power generation bases in China, including the centralized development and utilization of large-scale photovoltaics in Ningxia, Gansu, Qinghai, Xinjiang and other provinces, adopts the method of large-scale centralized development and centralized grid connection, which has caused some areas ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46
CPCY02E10/563Y02E10/56
Inventor 滕贤亮高宗和徐瑞丁茂生耿多马军戴则梅
Owner NARI TECH CO LTD
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