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New energy active output maximum value on-line calculation method considering power grid operation constraints

A technology for power grid operation and new energy, applied in the direction of single-network parallel feeding arrangement, electrical components, circuit devices, etc., can solve the problem of failure to calculate the output of new energy power stations and conventional units, difficult to guarantee calculation accuracy, and uncertainty of stable section limits And other issues

Active Publication Date: 2018-06-15
NARI TECH CO LTD +4
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Problems solved by technology

In fact, the limit of the stable section is not only related to the power grid equipment on / off status and load distribution, but also related to the output of new energy power stations and conventional units. It is impossible to determine the stable section limit before the calibration
Using the offline limit or online limit at the current moment to calculate the maximum value of new energy active output in the future will inevitably have the defect that the calculation accuracy is difficult to guarantee

Method used

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  • New energy active output maximum value on-line calculation method considering power grid operation constraints
  • New energy active output maximum value on-line calculation method considering power grid operation constraints
  • New energy active output maximum value on-line calculation method considering power grid operation constraints

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Embodiment Construction

[0045] The present invention will be described in further detail below with reference to the accompanying drawings.

[0046] This embodiment is a kind of implementation mode of the present invention, and its flow process is as follows figure 1 as shown,

[0047] figure 1 Step 1: Divide the power grid into internal network and external network according to the jurisdiction of power grid regulation and control. for t0 , record the current operating state of the power grid as S 0 , put t 0 The set of stable sections monitored by the control center at any time and related to new energy power generation is marked as A, the online evaluation period is marked as T, and (t 0 +T) At the time of this control center monitoring and related to the new energy power generation, the stable section set is recorded as B, and S 0 The static safety check fault set associated with the i-th stable section in B below is denoted as F 0i , the S 0 The union of the static safety check failure se...

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Abstract

The invention discloses a new energy active output maximum value on-line calculation method considering power grid operation constraints, and belongs to the technical field of dispatching automation of an electric power system. The method comprises the following steps: firstly, pre-estimating an online limit interval of a stable section; secondly, constructing a new energy active output maximization calculation model considering the power grid safety influence performance and economic and environment-friendly performance indexes of a new energy power station and a conventional unit through theconsideration of the median and peaking constraints of the stable section online limit interval, performing static safety checking on the obtained power grid operation state through optimization calculation, correcting the stable section online limit interval, and obtaining the power grid operation state meeting the static safety and peak adjusting constraints through iteration, finally, carryingout transient state and dynamic safety checking on the operation state, and obtaining the power grid operation state meeting the transient and dynamic safety and the peak adjusting constraints through iteration, and taking the sum of the corresponding new energy active output as the new energy active output maximum value considering the power grid operation constraints.

Description

technical field [0001] The invention belongs to the technical field of electric power system dispatching automation. More precisely, the invention relates to a method for online calculation of the maximum value of new energy active output taking into account static, transient and dynamic security constraints and peak regulation constraints of the power grid. Background technique [0002] New energy power generation has the characteristics of intermittent and randomness. In order to maximize the consumption of new energy power, it is necessary to predict the performance of the active output of the new energy power station, the real-time operation adjustment performance of the new energy power station and conventional units, and the economic and environmental performance. On-line dispatching of the influence degree of the active power output of energy power plants and conventional units on the online security and stability characteristics of the power grid. [0003] The patent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48
CPCH02J3/382H02J3/48H02J2203/20
Inventor 徐泰山汪马翔汪宁渤王昊昊段慧马彦宏张昊天陈钊丁坤赵龙
Owner NARI TECH CO LTD
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