The invention provides a distribution automation scheme optimization method and system based on reliability benefit evaluation. The method comprises the steps of collecting historical risk basic data and determining basic reliability parameters of an element; building a distribution network reliability calculation model comprising distribution automation equipment; setting element faults respectively, marking out a faulty section and a non-faulty section according to the position of a switch of the distribution automation equipment, and determining the faulty frequency and fault power-outage time of load points of the faulty section and the non-faulty section; obtaining the total fault frequency and total fault power-outage time of each load point by accumulating the fault frequency and the fault power-outage time of each time of the element faults; according to the total fault frequency and the total fault power-outage time, obtaining reliability indexes of a distribution network before and after the distribution automation equipment is applied; calculating a difference between the reliability indexes of the distribution network before and after the distribution automation equipment is applied, and optimizing a distribution automation planning scheme according to the difference and the type of the distribution automation equipment. By applying the distribution automation scheme optimization method and system based on reliability benefit evaluation, the optimization effect can be improved.

Distribution automation scheme optimization method and system based on reliability benefit evaluation

The invention relates to an analysis determining method of the power distribution reliability and the investment sensitivity of power distribution networks. The method is applicable to reliability-based optimal planning of power distribution networks. The method comprises the following steps that (1) the reliability and the investment sensitivity of a single measure are analyzed; (2) the comprehensive reliability and the comprehensive investment sensitivity of various measures are analyzed; (3) the reliability and the investment sensitivity at different development stages are analyzed. The method can guide planning and construction emphases of the power distribution networks, optimize investment decisions, define investment directions and investment emphases and improve the construction efficiency and benefits of the power distribution networks.

Analysis determining method of power distribution reliability and investment sensitivity of power distribution networks

The invention particularly relates to an optimizing configuration method and system for section switches The method includes the steps that the number of the newly increased section switches is optimized first in optimizing configuration of the section switches, the investment cost, operation and maintenance cost and power distribution system outage cost of the section switches are fully considered in number optimization, a dynamic model including the three costs is established, the weight ratio of the three costs is automatically adjusted in follow-up calculation, so that the cost result in a non-linear objective function is minimized, the non-linear objective function is combined with an administration area index to conduct repeated iterative operations, hence, the minimized cost result in the non-linear objective function is acquired from the multiple iterative operations, and the optimal number of the newly increased section switches is determined; afterwards, considering that the exchange direction of configuration branch circuits of the section switches can directly influence the outage cost, the system expectation power shortage and supply volume is used for optimizing the positions of the newly increased section switches By the adoption of the processing method, a section switch configuration mode which is more suitable for meeting the cost investment and practicality requirement can be acquired

Optimizing configuration method and system for section switches

The invention discloses an analysis method for turbine disc life expectance of a Weakest-Link method based on SWT parameters. The method includes the steps that 1, a smooth round rod sample and centercircular hole flat plate samples of different dimension scales are designed, and a low-cycle fatigue test of a turbine disc sample part is performed; 2, a life distribution index bN is obtained through analysis via fatigue life Weibull distribution parameters; 3, an SWT three-parameter power function life model is established, and through least square regression, an index coefficient m is obtained through analysis; 4, a damage parameter distribution index bW is calculated; 5, an effective damage parameter shown in the specification is calculated; 6, feature fatigue life shown in the specification is calculated; 7, a fatigue life Weibull distribution functional expression is obtained; 8, when the value of 0.5 is adopted as the reliability degree Ps or failure probability, prediction mid-value life Np is obtained, and when the value of 0.9987 and 0.0013 is adopted as the reliability degree Ps, a life expectance analysis result is obtained. According to the method, a physical dimension effect and a statistics dimension effect are considered at the same time, determination life prediction is achieved, and the life expectance result is obtained.

Analysis method for turbine disc life expectance of Weakest-Link method based on SWT parameters

The invention discloses a method and device for creating a power grid calculating model. The method and device are characterized in that the method includes the steps of obtaining power grid operation parameters; obtaining preset adjusting allocation weighted values and preset investment values of power grid planning objects, wherein the adjusting allocation weighted values are used for setting investment allocation proportions of the power grid planning objects; creating a relation model with dynamical system model software according to the received power grid operation parameters, the received adjusting allocation weighted values and the received investment values; after the assignment is carried out on power grid investment adjustment coefficients, processing the power grid investment adjustment coefficients according to relation information among the power grid operation parameters and the investment values in the relation model, judgment variables and the power grid investment adjustment coefficients, and obtaining adjusting values of the investment values of the power grid planning objects. By means of the method and device, the related technological problem that a balanced score card method provided by a power comprehensive plan is lack of operability and is insufficient in applicability is solved.

Method and device for creating power grid calculating model

The invention discloses a method of building a reliable improved effect relation between investment on a power grid and power supply Firstly, a relation model of feeder improvement measure investment and reliable improved effects (for reducing household weigh at blackout) including annular grid improvement, segment switch increasing, superterranean moved cables and the like is built with feeders serving as units A cost and benefit analyzing method is used for estimating all effects of improvement measures and finally, a reliable relation model of the investment on the power grid and power supply is set up With the method of building the reliable improved effect relation between the investment on the power grid and power supply, parameter variation of a feeder grid frame and improved household number in blackout corresponding to reliable parameter variation can be rapidly and effectively estimated, a good indicating effect can be exerted on a reliable improvement scheme on the power grid, a complicated power grid reliability estimating process is avoided, excellent reference values can be provided for arrangement of improvement of the power grid in a macroscopic mode and obtaining of the reliable level of the most proper power grid

Method of building reliable improved effect relation between investment on power grid and power supply

The invention discloses a power supply reliability and customer satisfaction quantitative relation model establishment method. The method includes the steps of firstly establishing four power supply reliability indexes and customer satisfaction quantitative relation models which respectively are a prearranged power failure time model, a prearranged power failure frequency model, a fault power failure time model and a fault power failure frequency model according to customer satisfaction research data, then calculating weight of the four power supply reliability indexes, and finally establishing a power supply reliability and customer overall satisfaction quantitative relation model. The method is simple and accurate, not only can be used for establishing the four power supply reliability indexes and customer satisfaction quantitative relation models which respectively are the prearranged power failure time model, the prearranged power failure frequency model, the fault power failure time model and the fault power failure frequency model, but also can be used for determining a weight coefficient of the importance of the four indexes according to customers. In addition, the method can reflect the quantitative relation between the four power supply reliability indexes and the customer satisfaction, and can reflect the conditions of customer satisfaction change when the power supply reliability indexes are changed.

Hu Bo

Papers

Method of building reliable improved effect relation between investment on power grid and power supply

Power supply reliability and customer satisfaction quantitative relation model establishment method