GOOSE mode network low frequency deloading method based on digital transmission network

A low-frequency load shedding, digital transmission technology, applied in AC network circuits, AC network voltage adjustment, power network operating system integration, etc., can solve problems that cannot be directly applied to digital substations

Inactive Publication Date: 2009-06-17
STATE GRID HENAN ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a new method of GOOSE networked low-frequency load shedding based on the digital transmission network, which overcomes the shortcomings that the traditional low-frequency load shedding scheme cannot be directly applied to digital substations

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  • GOOSE mode network low frequency deloading method based on digital transmission network
  • GOOSE mode network low frequency deloading method based on digital transmission network
  • GOOSE mode network low frequency deloading method based on digital transmission network

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Embodiment Construction

[0015] by figure 1 The schematic diagram of the configuration of the low-frequency load shedding function is shown as an example to describe the present invention. The frequency measurement and main logic judgment are completed in the bus PT measurement and control device, and the tripping GOOSE command is issued according to the set trip sequence; after the outlet protection measurement and control device receives the tripping command corresponding to this interval, it cuts off the line in order to restore the system frequency.

[0016] 1. Function configuration

[0017] Such as figure 1 The configuration principle of each functional unit of low-frequency load shedding is shown, and the networked low-frequency load-shedding functional system is composed of bus-related PT measurement and control devices, outgoing line measurement and control devices and Ethernet.

[0018] The low-frequency load shedding function module is configured in the bus PT measurement and control devi...

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Abstract

The invention relates to a GOOSE mode network low frequency load reduction method based on digital transmission network, wherein a part of outgoing line loads is removed according to given tripping runs and the changing of frequency, whole low frequency load reduction function is jointly completed by interval layer devices of different protected objects, a bus control unit is responsible for low frequency logical decision, a discriminant result is transmitted to various outgoing line control devices (dispersion execution units) in the mode of GOOSE signals through digital network, and an intelligent switch is driven by a control unit to trip and remove the loads to complete the whole logical function. Collected analog quantity is transferred to the control device by using IEC61850 standard SMV service message, and a discriminant logical result is transferred by using a GOOSE channel. The whole low frequency load reduction function can be directly used in a digital substation which is built based on IEC61850.

Description

technical field [0001] The invention belongs to the field of relay protection automation in the field of electric power engineering, and in particular relates to a new method for networked low-frequency load shedding in the GOOSE mode based on a digital transmission network. Background technique [0002] In the power system, frequency is an important quality index that reflects the basic state of the balance between supply and demand of active power in the power system. The capacity of power plants is very large, and large power plants account for a high proportion of capacity in the system; the distance between power generation areas and power consumption areas is lengthened, resulting in a serious imbalance between power generation and power consumption capacity in each local power system. In this case, the removal of a large power plant or an ultra-high voltage transmission line will lead to a serious imbalance in the power of each local power system, and the power shorta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/14H02J13/00
CPCY02B70/3225Y04S20/222
Inventor 王政涛王锐李海星李瑞生张克元
Owner STATE GRID HENAN ELECTRIC POWER
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