Refined and stable control method and system of electric system
A stable control method and power system technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as insufficient fineness and impact of power grids at both ends
Active Publication Date: 2015-03-25
GUANGZHOU ELECTRIC POWER DESIGN INST +1
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Problems solved by technology
Before UHV AC and DC transmission forms a network structure, there is no power flow transfer channel after a single UHV transmission channel fails, which will cause a large impact on the power grids at both ends, and inevitably cause a large proportion of machine and load shedding consequences
[0003] At present, the load shedding device of the power system stability control system is generally installed in 110kV and above substations. When shedding the load, the outlet switch is pulled and stopped, which has the characteristics of "one black and one black". Selective, not fine enough
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[0057] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0058] Such as figure 1 As shown, it is a refined stability control method for a power system of the present invention, comprising the following steps:
[0059] S11. Obtain the power grid system model, load shedding and unit information that need to be stabilized;
[0060] The real-time power grid model and load shedding and unit information can be obtained from the regional power grid energy management system and the user-side energy management system; the power grid system model is a physical connection model of each load shedding device and unit in the power grid system.
[0061] S12. Generate a power grid stability control model according to the power grid system model, load shedding and unit information, and obtain control strategies for each expected fault;
[0062] ...
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The invention provides a refined and stable control method of an electric system, which comprises the steps of acquiring a power grid system model, sheddable load and unit information to be subjected to stable control, generating a stable power grid control model, obtaining control strategies of predicted faults, acquiring real-time fault information of a power grid system, enquiring the corresponding control strategy according to the fault information, and assigning a load shedding command to sheddable load equipment in the power grid system according to the load shedding command in the control strategy. The invention further provides a corresponding system which can be refined to various load equipments to perform refined load shedding control on the electric system.
Description
technical field [0001] The present invention relates to the technical field of power load control, in particular to a method for refined and stable control of a power system, and a refined and stable control system for a power system. Background technique [0002] At present, the power grid industry is paying more and more attention to the emergency response to power safety accidents. The industry mainly divides the accident level based on the proportion of power grid supply load reduction. For example, for power grids in provinces and autonomous regions with a load of more than 20 million kilowatts, a reduction of supply load of 13% to 30% constitutes a major accident; a reduction of supply load of more than 30% constitutes a particularly serious accident. At present, the transmission capacity of a single UHV AC-DC transmission project in my country is relatively large. For example, the rated transmission power of Jinsu DC is 7.2 million kilowatts, and the rated transmissio...
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IPC IPC(8): H02J3/00
Inventor 莫光玲苏伟刘智勇陈昌振常乃超何光宇
Owner GUANGZHOU ELECTRIC POWER DESIGN INST