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Overload control method and coordination method of overload control and spare power automatic switch

A backup power self-switching and control method technology, applied in the direction of electrical components, circuit devices, AC network voltage adjustment, etc., can solve problems such as overload, achieve a comprehensive monitoring range, and avoid the effect of excessive load current

Inactive Publication Date: 2016-03-30
贵州电网公司兴义供电局 +1
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide an overload control method suitable for the power supply system including the 220kV substation with weak power supply, and to solve the overload problem caused by the rapid recovery of power supply by using the backup power self-switching technology

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  • Overload control method and coordination method of overload control and spare power automatic switch
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  • Overload control method and coordination method of overload control and spare power automatic switch

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Embodiment Construction

[0019] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The invention provides an overload control method, which is used in conjunction with the backup power self-input technology, and is suitable for power supply systems including 220kV substations with weak power supply. Refer to figure 1 As shown, station A and station D are two 220kV substations, station B and station C are two 110kV series power substations, and L1 to LN are several 110kV outgoing lines of 220kV substation A, supplying power for multiple 110kV load substations hanging below. figure 1 As an illustration, it means that 220kV substation A has only one main transformer running or is powered by a single power source, and 220kV substation A supplies power to multiple 110kV load substations, which is a weak link in the power supply system. The A02 of the tie line AB is a hot standby switch, which can be used for the backup ...

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Abstract

The present invention discloses an overload control method. The overload control method is suitable for the condition of weak power supply at a 220kV transformer station in a power supply system. The condition of the weak power supply at a 220kV transformer station is that: a single main transformer operates, a single power supply supplies power to the 220kV transformer station, and the spare power automatic switch of the 220kV transformer station cannot be performed, etc. The overload control method and the spare power are cooperatively used, and the spare power automatic switch is configured to perform quick recovery of power supply for the power-losing 110kV busbar of the 220kV transformer station through series-fed structure or a tie line. Aiming at the condition of overload of the power supply line caused by the action of the spare power automatic switch, the overload control method is configured to monitor whether the power supply line is overloaded or not, perform control of decreasing load when the overload of the power supply line happens, and only remove the load of 35kV or 10kV voltage levels without generation of loss of power of a 110kV load substation. The present invention further discloses a coordination usage method of an overload control and a spare power automatic switch.

Description

technical field [0001] The invention relates to a safe automatic control method for power transmission and distribution in a power system, in particular to an overload control method and a method for cooperating with backup power automatic switching. Background technique [0002] The 220kV substation in the power supply system may have weak power supply: for example, due to phased construction or equipment maintenance, there may be a weak mode of operation of a single main transformer. At this time, if a single main transformer fails, it will cause 220kV substation The 110kV busbar loses voltage, which leads to the voltage loss of multiple 110kV substations powered by the busbar, causing power outages for a large number of users; and for example, due to maintenance of some 220kV incoming power supplies or grid structure problems, there is only one incoming power supply or one double The return line is powered by a 220kV substation, and the 220kV substation cannot perform 220...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14H02J13/00
CPCY04S20/222Y02B70/3225
Inventor 王宇董凯达刘孝旭金震江开伦张春合冷贵峰余群兵樊国盛严伟杨欣李学洪胡绍勇廖清阳徐平陈飞建杨光祝远来王荣
Owner 贵州电网公司兴义供电局
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