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Fiber channel-based hot standby line power-side control standby power supply switching method

A fiber optic channel and backup power technology, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems of grid reactive power reverse transmission, high capacitive reactive power in substations, etc.

Active Publication Date: 2019-06-04
STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO
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Problems solved by technology

[0004] The purpose of the present invention is to provide a fiber channel-based hot standby line power supply side control backup power supply input method to solve the problems of excessive capacitive reactive power and grid reactive power in most substations

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  • Fiber channel-based hot standby line power-side control standby power supply switching method

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Embodiment Construction

[0219] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0220] In this scheme, Station C satisfies the following primary main connections (such as Figure 6 , 7 shown):

[0221] (1) Primary main wiring of 110kV inner bridge in 110kV substation;

[0222] (2) 110kV single busbar subsection primary main wiring in 110kV substation.

[0223] The power transmission and distribution network applied by the method of the present invention is two 110kV lines, two 220kV substations A, B and one 110kV substation C, comprising:

[0224] (1) 110kV line 1 and 110kV line 2 come from 220kV substations A and B respectively; (2) 110kV line 1 is respectively connected to the 110kV busbar of 220kVA station and the I-section busbar of 110kVC station, and there are circuit breakers 4DL and current transformers on the power supply side of line 1 CT4, circuit breaker 1DL and current transformer CT1 on the load side of l...

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Abstract

The invention discloses a fiber channel-based hot standby line power-side control standby power supply switching method. A C station is applied to a 110kV inner bridge primary main line of a 110kV substation, or a 110kV single bus line section primary main line of the 110kV substation. The problems of substation capacitive over high reactive power and power grid reactive power inverse transmissioncan be solved, the voltage level of the substation is improved, local power grid voltage can be prevented from being over high, and the overall operation level of the power grid is enhanced. The equipment loss and the insulation aging are reduced, the operating efficiency of the substation main equipment is improved, the substation power factor is improved, and the economical operation of the power grid is improved. The occurrence of large-scale power outage accidents when the main supply line is permanently faulty is effectively avoided, self-healing of the power grid is realized, and the power supply reliability is improved. The method disclosed in the invention can be used as a technical guarantee for the special operation mode of the power grid, thereby greatly improving the safety risk management and control under the special operation mode and promoting the safe and stable operation of the power grid.

Description

technical field [0001] The invention relates to a method for controlling the input of a standby power supply at the power supply side of a hot standby line based on an optical fiber channel, and belongs to the technical field of power transmission and distribution control. Background technique [0002] With the promotion of urban construction and the improvement of power grid structure, the high and low voltage sides of 110kV and below substations are generally powered by cable lines, resulting in increasing capacitive reactive power. On the one hand, most urban substations lack reactors due to the long operation time and the saturated number of intervals, so they cannot absorb excess capacitive reactive power; etc. are restricted by internal and external factors and cannot operate. What is more serious is that the phenomenon of reactive power transfer in the power grid during low load periods during holidays is common, resulting in a significant decrease in power factor an...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02J13/00
CPCY02B70/30Y02B90/20Y02E60/00Y04S10/16Y04S20/12Y04S20/20Y04S20/248
Inventor 巴宇马骏毅任萱张大林施伟成李静汤大海许象明杜炜凝马海薇
Owner STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO
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