Electric power system protection and control method based on risk assessment

The invention discloses an electric power system protection and control method based on a risk assessment. The method comprises the following steps: carrying out the risk assessment on an electric power system, and calculating power network risk values; establishing a protection and control object function; inputting electric power system running states and parameters; and according to the protection and control object function and the power network risk values, formulating electric power system protection and control measures. According to the invention, risk theories are applied to the protection and control of the electric power system, the problem of formulating protection and control measured by reliance on experience of dispatchers is solved, and quantifiable measures can be obtained by use of the method so as to effectively realize safety protection and control of the electric power system. Besides, the method, on the basis of the risk assessment, takes control cost into consideration ...

Emergency light

The utility model discloses an emergency light, including stopping electrical detection circuitry, illumination detection circuitry, control circuit, luminous circuit, stop electrical detection circuitry illumination detection circuitry with luminous circuit is all connected control circuit, stop electrical detection circuitry and still connect the supply circuit of illumination place lamps and lanterns, wherein, stop electrical detection circuitry, be used for detecting whether supply circuit breaks off, an output control signal when the disconnection, illumination detection circuitry is used for detecting the environment illumination intensity in illumination place works as when illumination intensity is lighter than predetermined threshold value, export the 2nd control signal, control circuit is used for when receiving control when a control signal and the 2nd control signal the luminous schedule time of luminous circuit. The utility model discloses an emergency light through stopping ...

Electric power system catastrophic accident risk assessment method

The invention discloses an electric power system catastrophic accident risk assessment method, and relates to the field of an electric power system operation safety assessment technology. The method comprises the following steps: (1), establishing a topology structure of an electric power system; (2), according to faults, examining whether an island exists in the electric power system; (3), calculating electric power system trends; (4), calculating risk indicators; and (5), determining whether a next-stage fault occurs. According to the invention, since the electric power system catastrophic accident risk assessment method takes the operation state and the topology structure of the electric power system into consideration in a comprehensive manner and combines a complex network theory with a risk theory, risks existing in the current operation state of the electric power system can be comprehensively accessed in a comprehensive, effective and accurate mode, the problem of incapability of ...

Power system cascading failure mode prediction method

The invention discloses a power system cascading failure mode prediction method, and relates to the technical field of power system cascading failure mechanism analysis. The power system cascading failure mode prediction method of the invention comprises the following steps: a, the steady-state power flow of a system before an initial failure is calculated; b, the comprehensive vulnerability index is calculated; c, the initial failure is determined; d, the comprehensive vulnerability index after failure is calculated; e, the comprehensive margin index Cij(s+1) of the system after failure is calculated; f, the (s+1)-level failure is determined; and g, whether the search termination condition is met is judged. According to the power system cascading failure mode prediction method of the invention, the possible cascading failure mode of the system is predicated by combining the power grid structure and state parameters, the predication indexes are combined with the actual situation of the ...

Method for monitoring reliability of power system element under condition of multiple meteorological factors

The invention discloses a method for monitoring the reliability of a power system element under the condition of multiple meteorological factors and relates to field of power system reliability analysis. The method for monitoring the reliability of the power system element under the condition of multiple meteorological factors comprises the following steps that a, the fault rate of the power grid element is calculated; b, risks are graded; c, a weight set of the meteorological factors is worked out; d, fuzzy comprehensive judgment is conducted; e, a judgment result is processed. According to the method for monitoring the reliability of the power system element under the condition of multiple meteorological factors, due to the fact that the combined influence of the multiple meteorological factors on the fault rate of the element and the influence of different meteorological grades of the multiple meteorological factors on the fault rate are both considered, the influence of the weather ...

Electric power system adequacy analysis method based on Monte Carlo simulation method

The invention discloses an electric power system adequacy analysis method based on a Monte Carlo simulation method, and relates to the field of electric power system adequacy analysis. The method comprises the following steps: step a, collecting element data to form system information; step b, sampling element state duration to form a system state sequence; step c, assessing each system state of an electric power system; and step d, obtaining the fault severity of the electric power system. According to the electric power system adequacy analysis method based on the Monte Carlo simulation method, an adequacy assessment mathematical model which takes weather conditions into consideration is established, a calculation method for a system element failure rate under a severe weather condition is brought forward, and an assessment result of a power network is calculated by use of the Monte Carlo simulation method based on element state duration sampling, such that a basis is provided for the ...

Electric power system vulnerability assessment method

The invention discloses an electric power system vulnerability assessment method, and relates to the field of a power network safety analysis technology. The electric power system frangibility assessment method comprises the following steps: (1), establishing a complex network structure of an electric power system; (2), establishing a structure vulnerability factor indicator through electrical betweenness in the complex networks structure; (3), obtaining network real-time trend data through a static energy function method; (4), calculating a state vulnerability factor, and calculating to obtain an integrated vulnerability assessment indicator through combination with a structural vulnerability factor in step (2); and (5), outputting a vulnerable area of the electric power system. According to the invention, since the electric power system vulnerability assessment method analyzes vulnerable links which may exist in the electric power system from a global perspective, the vulnerable area ...

Method for predicting impulse over voltage of generator

Meteorological calamity prediction method based on multivariate linear regression algorithm

The invention discloses a meteorological calamity prediction method based on a multivariate linear regression algorithm. The method comprises: first of all, according to historical data, determining major meteorological calamities of an area to be predicted in a specific period, and then respectively establishing a mapping relation equation between the various major meteorological calamities and meteorological factors; and finally, introducing meteorological factor parameter values in the mapping relation equation between the various major meteorological calamities and meteorological factors to obtain a value of probability that the corresponding meteorological calamities take place. According to the invention, the multivariate linear regression algorithm is applied to a meteorological calamity prediction technology, the mapping relation equation between the major meteorological calamities and meteorological factors is established, what is needed is only to collect the meteorological factor ...

Photovoltaic power generation hydrogen production cluster random optimization scheduling method based on Italian process

The invention discloses a photovoltaic power generation hydrogen production cluster stochastic optimization scheduling method based on the Italian process, and the method comprises the steps: firstly building a photovoltaic power generation hydrogen production system model which comprises a photovoltaic output Italian process model, an electrolytic cell cluster scheduling model and a hydrogen storage tank model; secondly, by taking the highest expected economic benefit and the highest energy utilization rate under the influence of photovoltaic output prediction error uncertainty as a target function, based on a photovoltaic power generation hydrogen production system model and by utilizing a control law of an affine strategy design system, establishing a stochastic optimization scheduling model of an electrolytic cell cluster; and finally, based on trajectory sensitivity decomposition, converting the stochastic optimization control model into a deterministic optimization problem, and performing ...

LED lamp is extinguish in time delay

The utility model discloses a LED lamp is extinguish in time delay, including the LED lamp, LED drive circuit, with LED lamp electricity is connected for the drive of circular telegram back the luminous illumination of LED lamp, tank connects the LED lamp with between the LED drive circuit, be used for during the luminous illumination of LED lamp by LED drive circuit department obtains the electric energy and the energy storage of charging, works as after LED drive circuit cuts off the power supply, the direct drive the LED lamp makes extinguish after LED lamp time delay illumination a period. The utility model discloses avoided sitting room or passageway in the back of turning off the light, light will make the people hardly see object on every side clearly suddenly secretly down, causes the collision, causes bigger injury even.

Electric power supporting method taking adjacent systems into consideration

The invention discloses an electric power supporting method taking adjacent systems into consideration, and relates to the field of recovery and control of an electric power system. The method comprises the following steps: a, establishing an object function; b, contracting a node; c, calculating a line betweenness; and d, optimizing and recovering a line. According to the invention, through recovering a generator and a load as much as possible and searching for an optimal power delivery path, the network reconstruction process is accelerated, and the path recovery time is shortened. Besides, path recovery and power support of adjacent electric power systems in the condition of a climate disaster are taken into consideration, and black-start recovery after an electric power system fails completely is safer and more reliable.

Multi-period schedulable domain analysis method for wind-solar hydrogen production and methanol synthesis system

The invention discloses a multi-period schedulable domain analysis method of a wind-solar hydrogen production and methanol synthesis system, which can intuitively quantify the load regulation potential of a P2M system under the uncertain condition of wind-solar power generation and realize visualization. Quantitative reference is provided for safe and economical operation when the wind-solar hydrogen production methanol synthesis system serves as a flexible load and participates in wind-solar power generation and power grid balance adjustment; according to the method, only linear programming and a polyhedron DD algorithm need to be solved, time-consuming complex numerical calculation is not needed, and popularization and promotion are facilitated.