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Accurate load control method taking economical efficiency and multi-time scale safety and stability into account

A multi-time scale, load control technology, applied in the direction of climate sustainability, power transmission and communication network, information technology support system, etc., can solve the problems of low load shedding efficiency and high economic cost, and achieve improved adaptability and effectiveness and the effect of lean level

Active Publication Date: 2017-12-26
NARI TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is: aiming at the deficiencies of the prior art, improve the adaptability of the load control method to the comprehensive safety, stability and economy of the transient state and the steady state, and avoid the follow-up stability problems of different time scales caused by solving the single stability problem after the fault, To solve the problems of low load shedding efficiency and high economic cost, a precise load control method considering economy and multi-time scale safety and stability is proposed

Method used

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  • Accurate load control method taking economical efficiency and multi-time scale safety and stability into account
  • Accurate load control method taking economical efficiency and multi-time scale safety and stability into account
  • Accurate load control method taking economical efficiency and multi-time scale safety and stability into account

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Embodiment 1

[0038] This embodiment is a precise load control method considering economy and multi-time scale safety and stability. The specific steps are as follows: figure 1 shown.

[0039] figure 1 Step 1 in the above description is to measure the electrical quantity of the local grid in real time from the online decision-making system platform, obtain the dynamic response curves such as system frequency and bus voltage within the given time window from the occurrence of the fault to the end of the actual measurement, and determine the load shedding measures. The regular economic loss and the liability cost of power safety accidents. Among them, the expressions of conventional economic loss and power safety accident liability cost are:

[0040] f J =F J1 +F J2

[0041] In the formula: F J is the sum of conventional economic losses and power safety accident liability costs after load shedding, F J1 Regular economic loss caused by the action of load shedding measures for the stabi...

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Abstract

The invention discloses an accurate load control method taking economical efficiency and multi-time scale safety and stability into account, and belongs to the technical field of electric power systems and automation thereof. In order to solve the safety and stability problem of different time scales of a system in the fault development process, load shedding measure cost and electric safety accident liability cost are calculated, transient generalized economic loss, quasi-steady-state generalized economic loss and steady-state generalized economic loss indexes are built, and millisecond, second and minute coordinating accurate load control is realized. Electric power system scheduling operating staff can grasp safety operation rules of the system with complicated faults on different time scales, and adaptability of an existing load control method of three defense lines is improved, so that safety and stability control effectiveness and lean level of a large power grid are improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a precise load control method considering economy and multi-time scale safety and stability. Background technique [0002] During the transition period of UHV power grid construction, the contradiction of "strong direct current and weak AC" in the power grid is prominent, and the proportion of UHV DC transmission capacity in the scale of the receiving end system continues to increase. Voltage problems and frequency problems are highlighted. In view of the power shortage caused by large disturbances in the receiving end power grid, in order to prevent stability damage, the safety and stability control device will be adopted to implement load shedding control measures according to the predetermined load shedding strategy; for accidents such as frequency and voltage abnormalities in the power system, low frequency Low-vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14H02J3/36
CPCH02J3/14H02J3/36Y02B70/3225Y02E60/60Y04S20/222
Inventor 张红丽刘福锁李威罗剑波孙仲卿王超石渠吴晨曦崔晓丹侯玉强刘平张倩顾晓玲潘彤李海峰罗凯明
Owner NARI TECH CO LTD
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