41 results about "Long term planning" patented technology

The invention discloses a wind power absorption capacity assessment method for an electric power system. Random statistical laws of wind power and load are mined based on historical wind power and load data, a wind power absorption capacity assessment model and a solving method are built on the basis, and the method not only can quantize the influence of wind power integration on power generation and peak load regulation capacity of the system, but also can effectively improve wind power absorption capacity by the aid of an energy storage system while meeting long-term planning requirements, so that the problem of difficulty in grid connection and absorption after large-scale wind power development is more effectively solved. The method has the advantage that calculated energy storage capacity Ex or wind power Pwny provides a reliable method and path for planning design and dispatch of the electric power system.

A method for monitoring sensor functionality comprising the steps of: repeatedly obtaining a dataset comprising sensor-specific calibration data; storing the acquired dataset comprising sensor-specific calibration data; analyzing the temporal development of the calibration data based on the stored dataset; And the time until the next calibration or the time weighted by the load factor is determined at least from the temporal development of the calibration data. The resulting point in time or the determined time weighted by the load factor can be output in a suitable form, for example immediately after determination, so that the calibration can be planned in the long term and / or the resulting point in time or the determined time weighted by the load factor can be Stored as data or remaining time. By comparison with a time signal or by counting down the remaining time, a request signal can be output on the due date, which can optionally also have a desired lead time.

The invention relates to the technical field of cascade reservoir operation, in particular to a cascade reservoir optimal operation method based on cascade reservoir operation coefficients, which is characterized by comprising the following steps of: 1, calculating the cascade reservoir operation coefficients; 2, establishing a cascade reservoir operation coefficient optimization model; and 3, carrying out comprehensive solution. The method has the beneficial effects that two indexes of the reservoir peak distribution coefficient and the base load coefficient are provided, and how to distribute the residual electric quantity of the system among the cascade hydropower stations in the research period and how to distribute the total power generation capacity of the hydropower stations in timesequence are determined. The minimum of the maximum output power shortage rate in a month is taken as an optimization target; conditions such as cascade reservoir output constraint, reservoir capacity constraint, flow constraint and hydraulic relation constraint are considered, an optimization model of cascade reservoir operation coefficients is established, a cascade hydropower space-time optimization distribution result is obtained through solving, and the method has important guiding significance for long-term planning and construction of a new energy base.

The invention discloses a game decision-making method and system in an incomplete information environment. The game decision-making method comprises the following steps of reasoning a current unknownstate of an environment according to the current known state of the environment to obtain an unknown reasoning state; exploring according to the unknown reasoning state to obtain an unknown actual state corresponding to the current unknown state, and obtaining a state for decision according to the unknown actual state and a historical known state; and making a decision according to the unknown reasoning state, the state for decision, the current known state and the feedback of the environment at the previous moment. The system comprises an unknown reasoning module, a state exploration module and a decision module. According to the technical scheme, the known states are utilized for prediction reasoning, the reasoned states are explored and integrated, decision is made by comprehensively exploiting the states and reasoning the states, the decision-making capability is high, and the long-term planning is good.

Disclosed is a modification strategy of an electric power system relay protection device. The modification strategy is characterized in that the modification strategy comprises the following steps: S1, calculating full life cycle cost of the relay protection device, and S2, determining a modification strategy, i.e., obtaining a minimum F(n)=Min(ALCC) of a full life cycle cost annual value of the relay protection device. Disclosed is a generation system of the modification strategy of the electric power system relay protection device. The generation system is characterized in that the generation system comprises a relay protection device modification strategy generation system (a server, a database, safety protection equipment and application software), and the relay protection device modification strategy generation system is connected with inputs of operation mode management database, a medium-term and long-term planning database, an EMS system and an asset management system, and an output of a relay protection modification project and a schedule. The modification strategy and the generation system are advantageous in that (1) modification time is determined according to the minimum annual value of the fill life cycle cost, and loss brought by a fault of the rely protection device is reduced, and (2) the generation system can automatically complete a modification assessment of the relay protection device according to a status of an electric power system and historical information, and the workload of manual assessment is alleviated.

The invention discloses a method for constructing a power generation time sequence simulation scene of multiple wind power plants. The method comprises the following steps: historical wind power sequences PN(t) are decomposed into low-frequency trend sequences Pl(t) and high-frequency random sequences Ph(t); the low-frequency trend sequences Pl(t) of different wind power plants are subjected to wind power fluctuation pairing; rising and falling durations of different wind power fluctuation processes are subjected to statistics, thereby obtaining a rising duration set {Trise} and a falling duration set {Tfall} of a time parameter set which embodies a fluctuation time-shifting characteristic; fitting is carried out on the paired wind power fluctuation processes through a Logistic function toobtain fitting parameters which are the fluctuation amplitude {L}, the rising steepness {Krise} and the falling steepness {Kfall} respectively; and an optimal Copula function model is built and parameters are extracted from the model, thereby constructing a power generation time sequence simulation scene of the multiple wind power plants. The method can simulate change rules of historical outputsof the multiple wind power plants at the same time, and has important significance for long-term planning, year / month scheduling and safe and stable operation in a power system.

The invention discloses a medium-term and long-term trading-operation plan-acquiring method considering wind-electricity acceptance. By the method, a trading-operation integrated mathematical model is established by aiming at the realistic problem of needing large-scale wind-electricity acceptance by using medium-term and long-term trading plans and operation plans carried out by an electrical power company as the background, optimized target functions are the minimum total operating cost and the maximum wind-electricity elimination and acceptance of a system, and constraint conditions include the security constraint of electric-network operation and the physical constraint of generator operation. In order to reduce the solving dimensionality of the model, plan-scale compressing and mapping technologies are provided for compressing the time scales of the medium-term and long-term plans into typical-week time scales, the plan of a typical week is firstly obtained through optimized calculation, and the plan of the required medium-term and long-term time scales is formed through mapping relation, so that the electrical power company needing large-scale wind-electricity elimination and acceptance can be helped to make medium-term and long-term trading plans and operation plans, and therefore decision-making scientificity and validity are improved, the method is helpful to improving the accepting level of the wind electricity, and the production cost of electric energy is lowered.

Disclosed is a modification strategy of an electric power system relay protection device. The modification strategy is characterized in that the modification strategy comprises the following steps: S1, calculating full life cycle cost of the relay protection device, and S2, determining a modification strategy, i.e., obtaining a minimum F(n)=Min(ALCC) of a full life cycle cost annual value of the relay protection device. Disclosed is a generation system of the modification strategy of the electric power system relay protection device. The generation system is characterized in that the generation system comprises a relay protection device modification strategy generation system (a server, a database, safety protection equipment and application software), and the relay protection device modification strategy generation system is connected with inputs of operation mode management database, a medium-term and long-term planning database, an EMS system and an asset management system, and an output of a relay protection modification project and a schedule. The modification strategy and the generation system are advantageous in that (1) modification time is determined according to the minimum annual value of the fill life cycle cost, and loss brought by a fault of the rely protection device is reduced, and (2) the generation system can automatically complete a modification assessment of the relay protection device according to a status of an electric power system and historical information, and the workload of manual assessment is alleviated.

The invention discloses an FTTH network management server. The FTTH network includes a first-level virtual optical splitter, a first-level physical optical splitter, a second-level virtual optical splitter, and a second-level physical optical splitter. The output ports of each first-level physical optical splitter connected to the input port of a secondary physical optical splitter, and the output port of each primary virtual optical splitter is connected to the input port of a secondary virtual optical splitter; the management server stores the optical splitter information of each optical splitter and the The connection information among them is used to manage the FTTH network, and the optical splitter information includes identification information of whether the optical splitter is a virtual optical splitter or a physical optical splitter, the location of the optical splitter and the splitting ratio of the optical splitter. The invention also discloses a corresponding dynamic fiber jumping method. The scheme of the invention improves the resource utilization rate of the resource port, reduces idleness of equipment resources, and facilitates long-term planning of the network at the same time.