Area voltage stability monitoring method based on synchronous phasor measurement

A technology of synchronized phasor measurement and voltage stabilization, which is applied in the direction of measuring current/voltage, measuring electrical variables, measuring devices, etc., and can solve problems such as equivalent parameter drift

Inactive Publication Date: 2008-04-02
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most representative one is Khoi Vu et al. (Vu K, BegovicM M, Novosel D, et al. Use of Local Measurements to Estimate Voltage Stability Margin. IEEE Trans on Power Systems, 1999, 14(3): 1029-1035) The proposed index f

Method used

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  • Area voltage stability monitoring method based on synchronous phasor measurement
  • Area voltage stability monitoring method based on synchronous phasor measurement
  • Area voltage stability monitoring method based on synchronous phasor measurement

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Experimental program
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Embodiment 1

[0048] Embodiment 1 takes the Zhoukou area of ​​Henan power grid as an embodiment

[0049] Step 1: Select the heavy-load receiving end area in the system as the key monitoring area, and use the synchrophasor measurement device to simultaneously sample the overall load power of the area and the voltage and current phasors of the key load nodes in the area. In this embodiment, the Zhoukou area is a monitored area object as a load area in the Henan Provincial Network. The distribution of sampling points is shown in Figure 5, including Xuepo-Huaiyang, Shaoling-Huaiyang, Shaoling- The tidal current power on the three branches of the water village, and their sum is the total outgoing power flowing into the Zhoukou area, which can represent the overall load change in the area; and the voltage and current phasors of the two load nodes of Huaiyang 110KV and Shuizhai 110KV , the "total load in Zhoukou area", "node voltage" and "node load" in Table 1 are continuous sampling data of a cer...

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Abstract

The invention relates to a regional voltage stability monitoring method based on synchronous phasor measurement, including the following steps: a heavy loading receiving end district in a system is selected as a monitoring object and synchronous sampling of regional total load and voltage and current phasors of the minor key load nodes within the region is completed by use of a synchronous phasor measuring apparatus; according to the continuous sampling data of voltage and current phasors, the voltage stability index of key nodes is calculated; the validity of the index of each node can be judged through examining whether the change between node load and the total load of the region where the node locates accords with approximate synchronous change; the maximum value of the effective stability index of all sampling load nodes at the same time and the same region is output as the stability index of the region. In the stage of frequent long-term voltage destabilization such as increasing regional load, the method can realize accurate and effective real-time assessment of system voltage stability and provides effective voltage stability information to operation personnel in time.

Description

technical field [0001] The invention belongs to the field of on-line monitoring of power system voltage stability. Background technique [0002] In order to ensure the stable operation of the power system and provide users with stable and economical electric energy, the power grid dispatching center must monitor the operation of the power system at any time, and evaluate the safety level of the system through security analysis. The monitoring of system voltage stability is one of them. an important aspect. [0003] The current monitoring and preventive control methods for voltage stability include the following three categories: [0004] 1. Low voltage load shedding. This type of method relies on local measurement equipment to implement control measures such as load shedding only based on the reduction value, delay value, and change rate of the node voltage amplitude. It does not rely on communication channels, and the control cost is low, simple, fast, and has many practi...

Claims

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Application Information

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IPC IPC(8): G01R19/165G08C19/00
CPCY02E60/728Y04S10/265
Inventor 余贻鑫赵金利
Owner TIANJIN UNIV
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