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323 results about "Risk indicators" patented technology

A key risk indicator ( KRI) is a measure used in management to indicate how risky an activity is. Key risk indicators are metrics used by organizations to provide an early signal of increasing risk exposures in various areas of the enterprise.

Power system weak link identification method based on risk evaluation

The invention relates to a power system weak link identification method based on risk evaluation and belongs to the field of power system analysis. The method includes acquiring fault probability of elements of a power system, a future load curve of the power system, states of the elements and load of nodes of the power system; utilizing a minimum load shedding loss optimization model to judge the failure state of the power system and determining the optimum load shedding quantity of each node under each element sampling state; finishing calculation of risk indicators of the power system through repeated sampling and power system failure state judgment; conducting statistics on the weak link characteristic quantity corresponding to faults of generators and an electric transmission and transformation device, calculating five element weakness recognition indicators of the elements according to the risk indicators and the weak link characteristic quantity and finally sorting the recognition indicator values to recognize the weak link of a generator set and the electric transmission and transformation device. By means of the method, the weak link of the power system is improved, large-area power failure of the power system is prevented, and operation safety of the power system is improved.
Owner:TSINGHUA UNIV

Operation risk evaluation method comprising wind- power plant electric system

InactiveCN103246806AAvoiding Situations Where Monitoring Runs IgnoredPrevent or reduce shadowingData processing applicationsSpecial data processing applicationsElectric power systemState parameter
The invention discloses an operation risk evaluation method comprising a wind-power plant electric system. With view to affection on the electric system from a wind-power plant, the operation risk evaluation method traces back to nodes and includes that real-time importance degree weights of the nodes are introduced into risk indexes, affection of a network topology and real-time tide state information is comprehensively reflected, real-time risk variation of the electric system under the action of the wind-power plant can be truly reflected, updating of various state parameters and risk level sequence is completed in real time in a short calculation period of system running risk evaluation, the problem that operating monitoring of power plants or substation busses high in importance degree is ignored is avoided, value-at-risk is converted into a dimensionless utility value by evaluating a function through consequence severity of exponential risk-preferred utility function, the risk-at-value is increased at different degrees so as to increase risk level difference identification degree and differentiation degree under same low-loss-load probability and scientifically compare different risk levels.
Owner:ZHEJIANG UNIV +2

Electric-gas-heat interconnection system risk evaluation method for considering solar thermal CHP plants and electric boiler

ActiveCN107730129APreserve actual operating characteristicsReasonable quantification of the severity of wind and solar curtailmentDesign optimisation/simulationResourcesCogenerationEngineering
The invention discloses an electric-gas-heat interconnection system risk evaluation method for considering solar thermal CHP plants (STCHP) and an electric boiler (EB). The method comprises steps of establishing an energy flow model based on a coupling element STCHP and EB, and a wind and light abandoning and electric / gas / heat load reduction composite minimal optimization model; establishing a system level risk index of electric power / gas quantity / heating power insufficient expectations and wind abandoning / light abandoning expectations of the electric-gas-heat interconnection system; based onthe established energy flow model, the established load reduction model and the evaluation index, further considering various random factors of element faults, electric / gas / heat load, wind electricitypower and photoelectric power and providing a step and schedule graph about electric-gas-heat interconnection system risk evaluation for considering the STCHP and the EB; and finally, achieving calculation and analysis work of the electric-gas-heat interconnection system risk evaluation for considering the STCHP and the EB on an MATLAB platform through programs.
Owner:CHONGQING UNIV

Anti-fraud identification method and apparatus for insurance claim settlement

InactiveCN107240024AEasy to handleStrengthen the identification of hidden risksFinanceCommerceRisk indexComputer science
The invention relates to an anti-fraud identification method and an apparatus for insurance claim settlement, wherein the method comprises: after a claim settlement anti-fraud system receives a claim settlement application with the claim settlement information, determining the type of the claim settlement case corresponding to the claim settlement application; obtaining a pre-trained and generated anti-fraud identification model corresponding to the claim settlement application; obtaining the risk factors for the anti-fraud identification model corresponding to the claim settlement application; obtaining from a booked financial system the risk factor information of the anti-fraud identification model corresponding to the claim settlement application; inputting the risk factor information to the anti-fraud identification model; outputting the risk index value corresponding to the claim settlement application; based on the risk index value and the preset risk processing rules, determining the risk processing manner corresponding to the claim settlement application; and based on the risk processing manner, performing risk processing to the claim settlement application. With the method and the apparatus of the invention, it is possible to quickly process the claim settlement applications in batch, to increase the efficiency of anti-fraud identification, and to identify the hidden fraud risks to the largest extent.
Owner:CHINA PING AN LIFE INSURANCE CO LTD

Method for evaluating power system static risk based on hybrid power flow

ActiveCN103985066AAvoid Pessimistic EvaluationsAvoid the problem of non-convergence of resultsData processing applicationsElectric power systemPower grid
The invention discloses a method for evaluating the power system static risk based on hybrid power flow. The method comprises the steps that (1) according to the current structure of a power system and a planning scheme, a corresponding planning scheme model is established; (2) according to equipment data and the structure of a power grid, predicated faults of the power grid and the possibility of the predicated faults are analyzed, and then a predicated fault set is established; (3) the power flow corresponding to all the faults in the predicated fault set is worked out through the risk state based on the hybrid power flow, and for the fault with power flow out of range, load loss is used as a fault consequence; (4) according to the load loss of the fault states and the possibility of the fault, the system risk indicator is worked out; (5) according to the system risk indicator, the weak link of the system is found. According to the method for evaluating the power system static risk based on the hybrid power flow, the problem that when high-order fault occurs in a large complicated power grid, misconvergence of power flow is caused due to the fact that only alternating-current power flow is applied during risk evaluation is solved through the hybrid power flow.
Owner:TIANJIN UNIV +1

Operational risk assessment method for large-scale photovoltaic grid-connected distribution networks

InactiveCN108898287AReal-time forecast outputPredict load fluctuations in real timeLoad forecast in ac networkResourcesNODALRisk evaluation
Provided is an operational risk assessment method for large-scale photovoltaic grid-connected distribution networks. The method comprises: establishing a real-time prediction model of photovoltaic output and load fluctuation; obtaining a probability density function and a cumulative distribution function of branch power flow and node voltage by using probability distribution of node voltage and branch power flow calculated by a Monte Carlo method; according to the cumulative distribution function, solving off-limit probability of each node voltage and branch power flow, calculating probabilityindexes, severity indexes and risk indexes of node voltage and branch power flow according to probability distribution of variables to be obtained, and evaluating security risk of photovoltaic connection to a distribution network, and based on a result, providing corresponding control measures. The method fully considers randomness and uncertainty of photovoltaic and load, adopts typical parameters as risk evaluation indexes, and accurately predicts risk of the distribution network based on Monte Carlo probability power flow, and has important practical significance for improving safety, reliability and economy of distribution network operation after photovoltaic grid connection.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2

Probability assessing method for stage type protection operational risk of electric power system

The invention discloses a probability assessing method for a stage type protection operational risk of an electric power system, and the probability assessing method belongs to the field of the relay protection of the electric power system and the reliability of the electric power system. The probability assessing method comprises the following steps: determining a protection system to be assessed and a false action source set; carrying out invalidation classification analysis on the protection system to be assessed; calculating the instantaneous false action probability of a protection element in the false action source set in a new electric network structure and in a power flow state; if the false action of the protection system in the false action source set also cuts off a line where the false action is positioned, carrying out N-2 power flow calculation to obtain load loss corresponding to a current faulty line; calculating the instantaneous non-startup probability of the protection element in the false action source set and the load loss caused by a remote backup action; calculating the risk indicator, the total instantaneous false action probability and the total instantaneous non-startup probability of the protection system to be assessed; and judging a weakest protection link in the electric network. The probability assessing method has the beneficial effects that the principle characteristic of protection is reflected, and the action rejection probability, the false action probability and the corresponding operational risk of the protection can be quantitatively calculated.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Power system voltage stability risk assessment method capable of considering load fluctuation limit

The invention relates to a power system voltage stability risk assessment method, and in particular relates to a power system voltage stability risk assessment method capable of considering load fluctuation limit, aiming at solving the problem that the existing voltage stability assessment is single in point of view. According to the method, a probabilistic power flow simulation method of Latin hypercube sampling is applied to voltage stability analysis of a power system, and the situation of system crash caused by load power radical change and system network framework structure change can be studied. The voltage risk index, load node type risk index, network load bearing capacity risk index and financial loss risk index are taken as basis, and the voltage stability of the system is comprehensively analyzed by the multiple indexes from multiple points of view, so that the nodes with weak voltage in the system, the nodes with weak load fluctuation, the range of load bearing capacity of the system and the nodes with high financial loss risk in the system can be found. The power system voltage stability risk assessment method provides powerful basis for carrying out voltage monitoring, load monitoring, network planning and economic evaluation on the power system.
Owner:TAIYUAN UNIV OF TECH

Power grid enterprise electricity-selling side risk assessment method based on triangular fuzzy number and improved analytic hierarchy process

The invention relates to a power grid enterprise electricity-selling side risk assessment method based on a triangular fuzzy number and an improved analytic hierarchy process. The method specifically includes following steps: establishing a power grid enterprise electricity-selling side risk assessment index system; establishing a power grid enterprise electricity-selling side risk assessment index scoring standard; establishing a triangular fuzzy conversion function; establishing an index scoring mapping relation; establishing a determination matrix; determining the matrix consistency verification; returning to the previous step if the consistency is not satisfied; moving to the next step if the consistency is satisfied; calculating a weight coefficient; and determining an important risk factor. According to the method, risk assessment of various risk indexes is conducted through an expert scoring method, the electricity-selling side risk can be comprehensively evaluated, the assessment method is simple and easy to operate, but the subjectivity is relatively high; and the subjectivity of expert scoring can be reduced with the cooperation of a multi-dimensional expert scoring set based on the triangular fuzzy number so that the accuracy of results output by the subsequent analytic hierarchy process is improved.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHN INST +2
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