Reactive power optimization method giving consideration to off-limit voltage correcting and active power loss reducing

A technology for correcting voltage and active power loss, which is applied in the field of reactive power optimization in power systems, and can solve problems such as unreasonable optimization results

Active Publication Date: 2015-01-21
STATE GRID CORP OF CHINA +3
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Problems solved by technology

Therefore, increasing the node voltage will help to reduce the active power loss of the system. Therefore, under the premise of satisfying the safety constraints, appropriately increasing the system voltage will be

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  • Reactive power optimization method giving consideration to off-limit voltage correcting and active power loss reducing

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[0048] The reactive power optimization method of the power system proposed by the present invention, which takes into account both the correction of voltage over-limit and the reduction of system active power loss

[0049] Combined embodiment is described in detail as follows:

[0050] The reactive power optimization method of the power system proposed by the present invention, which takes into account both correction of voltage over-limit and reduction of system active power loss, includes the following steps:

[0051] 1) Collect the current real-time measurement data of the power grid, and obtain the base state value of the current power grid operation state through state estimation and power flow calculation: set the base state voltage amplitude of the i-th node as V i , its upper voltage limit is The lower voltage limit is and (from the quarterly voltage operation curve formulated by the operator); for the generators participating in the reactive power optimization of...

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Abstract

The invention relates to a power system reactive power optimization method giving consideration to off-limit voltage correcting and system active power loss reducing, and belongs to the technical field of power system optimized dispatching control. The reactive power optimization method is based on current power grid ground state flow and includes the steps of firstly scanning a whole grid to judge whether off-upper-limit voltage phenomena exist or not, and as for off-upper-limit voltage nodes, starting reactive power adjustment computing with voltage correcting as an object to eliminate the off-limit voltage; then starting voltage increasing reactive power optimization with system active power loss reducing as an object. The reactive power optimization method meets complexity operation requirements and the requirement, for the reasonable reactive power voltage automatic control computing result, of the power grid, and can be integrated in an automatic voltage control main station system operated in a dispatching center, and therefore the system can provide a control object for a reactive power voltage control strategy in real time through optimization computing according to the operation state of the power grid at present so that the control requirement for safe, high-quality and economical operation of the power grid can be met.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a power system reactive power optimization method that takes into account both correction of voltage overrun and reduction of system active power loss. Background technique [0002] The automatic voltage control (AVC) master station system running in the control center coordinates and controls the reactive power resources in the power grid, which plays an important role in ensuring the safe, high-quality and economical operation of the power system. A typical automatic voltage control master station system consists of hour-level reactive power optimization calculation of the whole network and minute-level partition control decision-making. Through the reactive power optimization calculation of the whole network, the optimal setting value of each key bus voltage is given as Partition control provides control objectives; through partition cont...

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30H02J3/50H02J3/18
Inventor 王彬王丰郭庆来吴涛孙宏斌金海峰陈之栩张涛汤磊刘苗张伯明李煊
Owner STATE GRID CORP OF CHINA
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