7 results about "Reserve capacity" patented technology

The invention discloses a user side hydroelectric resource collaborative optimization scheduling method, and the key point is to improve the operation benefit and risk management capability of a hydropower station group. By constructing a user side hydropower monthly output optimization model, according to a monthly electric quantity contract and a reserve plan, the method dynamically adjusts an operation plan and distributes reserve capacity in combination with the actual water inflow condition of the current month. The model introduces a joint opportunity constraint of shared storage capacity, the joint opportunity constraint is converted into a single-dimensional opportunity constraint according to a risk allocation principle, and the reliability of a scheduling strategy is enhanced. By evaluating the water level deviation degree, reasonable distribution of the reserve capacity is ensured, and stable operation of the power grid is supported. Furthermore, in consideration of the water level control and standby response capability of each hydropower station, the configuration strategy of the standby capacity is optimized, and the overall economic benefit and the utilization efficiency of clean energy are remarkably improved. The method provides an innovative solution for scheduling of small and medium-sized hydropower stations.

The invention relates to a day-ahead and intra-day optimization scheduling method, device and equipment containing a dual-mode air energy storage system and a readable storage medium. Through a dual-mode air energy storage system model, a load prediction value and a prediction range of the electric power system, first output prediction information and second output prediction information of the two air energy storage systems are determined, and a day-ahead optimization model is established according to the load prediction value and the prediction range, the first output prediction information, the second output prediction information and a target function. And outputting the first output scheduling strategy, and outputting a second output scheduling strategy based on the intra-day optimization model according to the first output scheduling strategy and the spinning reserve capacity constraint. Compared with the traditional scheduling optimization of a single energy storage system, the scheme performs multi-dimensional output strategy scheduling by constructing the dual-mode air energy storage system model and combining the load prediction value and the prediction range, the output prediction information of each system and the day-ahead and intra-day optimization models, so that the comprehensiveness of output scheduling of the power system is improved.

The invention provides a new energy consumption resistance capacity evaluation early warning method and device considering power grid peak regulation constraint. The method comprises the steps of setting a peak regulation negative reserve capacity threshold; based on the minimum output ratio of the thermal power generating unit, the output limit value of the hydroelectric generating unit, the pumping state full output of the pumped storage power station and the novel energy storage charging state full output, four types of negative reserve capacity calculation models are established; calculating the negative reserve capacity required by the operation of the power grid in combination with the ultra-short-term load predicted value and the threshold value; obtaining an ultra-short-term output predicted value of the new energy station; formulating output plans of thermal power, hydropower, pumped storage and novel energy storage according to load and new energy prediction results; calculating the actual negative reserve capacity of the power grid based on the power generation plan and the negative reserve capacity calculation model; and judging the blocked capacity by comparing the required negative reserve capacity with the actual negative reserve capacity. The method has the advantages of being small in data size, efficient in calculation, clear in physical significance and the like, day-ahead power generation plan optimization and intra-day emergency scheduling can be effectively supported, and fast statistics of blocked electric quantity is achieved.

An apparatus and process for distributing coolant through first and second coolant loops comprising a pump having a first outlet port connected to the first coolant loop and a second outlet port connected to the second coolant loop. A valve switches coolant to the first or second outlet port individually or to the first and second outlet ports concurrently. Coolant pumped by the pump at an unrestricted rate of flow is circulated at a rate of flow less than the unrestricted rate of flow when the valve connects the first outlet port and circulated at a rate of flow less than the unrestricted rate of flow when the valve connects the second outlet port. When the valve connects the first and the second outlet ports concurrently coolant is circulated through the first and the second coolant loops at a rate of flow equal to the unrestricted rate of flow.

The present invention discloses a method and system for evaluating the reserve adequacy of a thermal power unit's annual maintenance plan. The method comprises the following steps: obtaining the maximum load of the power grid to be evaluated for reserve adequacy by ten-day forecasting, calculating the capacity of the operating grid-connected coal-fired power units based on the maximum load; calculating the maintenance reserve capacity and the annual coal-fired power unit's maintenance capacity time; calculating the annual coal-fired power unit's maintenance required capacity time based on the grid-connected coal-fired power unit's capacity; calculating the maintenance capacity time occupancy rate based on the annual coal-fired power unit's maintenance capacity time and the annual coal-fired power unit's maintenance required capacity time; and obtaining an evaluation result based on the maintenance capacity time occupancy rate and a preset evaluation criterion. The method of the present invention has low dependence on load forecast accuracy and the future topology of the power grid, and can effectively solve the technical difficulties in preparing data for power grid adequacy evaluation on a medium- to long-term scale.

This invention belongs to the field of power systems and relates to a day-ahead gas generator scheduling optimization method for power systems. The method includes the following steps: S10, constructing a function with the objective of maximizing the system's minimum reserve capacity, minimizing economic costs, and reducing carbon emissions; S20, constructing natural gas supply constraints for day-ahead gas generators; S30, constructing power balance constraints between power generation and consumption in the power system, as well as stability limit constraints to ensure system operation; S40, constructing start-up and shutdown constraints, ramp-up and ramp-down constraints, and upper and lower output limit constraints for gas generators and coal-fired generators; S50, based on the objective function and constraints constructed in the above steps, constructing a day-ahead gas generator scheduling optimization model and solving it through mixed-integer linear programming to obtain the optimal day-ahead gas generator scheduling scheme. This invention can optimize the time distribution of reserve capacity, has good engineering applicability, and significantly improves the decision-making efficiency and scientific rigor of day-ahead scheduling plans.

An apparatus and method for distributing coolant through a first coolant loop and a second coolant loop includes a pump having a first outlet port connected to the first coolant loop and a second outlet port connected to the second coolant loop, and a valve positioned on the pump housing switchable to direct coolant to either the first outlet port or the second outlet port individually, or to the first outlet port and the second outlet port simultaneously. The coolant is pumped by the pump at an unrestricted flow rate and circulated through the first coolant loop at a flow rate less than the unrestricted flow rate when the valve connects the first outlet port to the first coolant loop, and circulated through the second coolant loop at a flow rate less than the unrestricted flow rate when the valve connects the second outlet port to the second coolant loop. Coolant is circulated through the first and second coolant loops at a flow rate less than the unrestricted flow rate when the valve simultaneously connects the first and second outlet ports to the first and second coolant loops, and the combined flow rates through the first and second coolant loops are equal to the unrestricted flow rate.