35results about How to "Efficient and economical operation" patented technology

The invention relates to the technical field of photovoltaic micro-grid control, and particularly discloses a real-time coordination and control method of a photovoltaic micro-grid system. A central real-time optimal control layer and a local control layer are involved in the real-time coordination and control method. The central real-time optimal control layer collects the voltage and frequency of an AC bus of the photovoltaic micro-grid system, the charge state of a storage battery pack, the output power of photovoltaic power generation micro-sources, the output power of the storage battery pack, the output power of a super capacitor and the real-time power of a load in real time, generates a real-time coordination and control strategy and a secondary frequency modulation and scheduling plan, and issues the strategy and the plan to all local controllers. The local control layer coordinates and controls all the micro-sources in real time, and particularly achieves the scheduling plan issued by the central real-time optimal control layer. According to the real-time coordination and control method, a micro-grid central optimizing controller can manage, coordinate and control all the local controllers in a unified mode, the micro-grid can efficiently and economically run, the output power of the photovoltaic power generation unit is utilized to the maximum extent, the output power fluctuation and the tracking load change of the photovoltaic power generation unit are restrained, the running method of the micro-grid is reasonably adjusted, and energy balance is achieved.

A method for optimizing the operation of an electro-thermal coupling integrate energy system is disclosed. An objective function and constraint conditions of the operation optimization of the electro-thermal coupled integrated energy system are established, so as to establish the operation optimization model of the electro-thermal coupling comprehensive energy system, then the simulation model ofheat network and heat load state is established, taking the temperature of heat medium injected into the heating network in the operation optimization result as the input to calculate the actual stateof the heating network and heat load, at last, the operation optimization flow of the electrothermal couple integrated energy system is established, the results of simulation model are compared withthose of optimization model, and error values are judged. As the error exceeds the allowable range, the resolution of the heating network and the heat load model is reduced and the above steps are repeated, otherwise, the method stops, thereby determining the appropriate resolution of the heat network and the heat load model. The method can fully consider the slow dynamic process of the change ofthe heat network and the heat load state in the dispatching instruction cycle, and effectively ensures the user comfort while realizing the efficient and economical operation of the system.

The invention provides a hierarchical optimization method for a united cold supply system consisting of a conventional electric refrigerator and an ice storage system. The method comprises the steps of optimizing the on-state and the optimal power setting value of each cold source by adopting a mixed integer programming method according to the economic model of each cold source and the time-of-use power price policy, designing a target-coupled coordinated distributed prediction control method to better improve the dynamic performance of the system in view of the dynamic adjusting characteristic and physical constraint of each cold source, and newly optimizing the setting value of each cold source under a distributed framework, so that each cold source ensures the total load in the dynamic process and tracks the optimal refrigerating power setting value as much as possible at the same time. The method quantitatively solves the steady and dynamic scheduling problem of the united cold supply system by adopting mixed integer programming and distributed prediction control methods respectively, and provides a rational suggestion for energy management and optimization scheduling of the cold supply system.

The invention discloses expressway distributed photovoltaic-storage-charging AC-DC hybrid microgrid self-service charging stations which are arranged on two sides of an expressway respectively. Each station mainly includes a power generating side and a load side; the power generating side includes renewable energy generation systems, energy storage stations and a direct-current bus, the output ends of the renewable energy generation systems are connected to the direct-current bus via DC-DC converters having a maximum power tracking function, and the energy storage stations are connected with the direct-current bus via bidirectional DC-DC converters; the load side includes dual-mode AC-DC charging piles and an alternating current bus, the direct-current bus is connected with the alternatingbus via DC-AC converters; the direct-current buses of the stations on opposing side of the expressway are connected via an energy mutual supply line. A photovoltaic-storage-charging distributed AC-DChybrid microgrid is established herein; relay charging is provided for new energy vehicles running on inter-city roads or on expressways for long range; the application problems that new energy vehicles have low storage battery energy density, dependence on grid construction, 'short driving range' and the like are solved.

The invention relates to an electric power work management and control method combining a motion trail. The method comprises the steps as follows: providing a page layout displaying an overhaul plan in a working period of a work group comprising all external network users, marking all completed exploration and permission of the overhaul plan and a work responsible person's signature position on a map; and listing all usable mobile client equipment, types and the time of lastly uploading a GPS position by the map, and further displaying the history trail of the mobile client equipment moving in a period of time. The method carries out comprehensive monitoring and management of electric power overhaul by combining GPS data and the motion trail, provides multifunctional and visual process of the implement, monitoring and maintenance of the electric power overhaul work, improves management level of operation, maintenance, overhaul and urgent maintenance of electric power enterprises, normalize work procedures including daily operation and maintenance, overhaul and fault urgent maintenance, improves fault urgent maintenance efficiency, enhances filed operation dispatch, improves the modern electric grid control ability of the electric power enterprises, and ensures reliable, efficient and economical operation of the power grid.

The invention discloses a cold water system control method and device of a distributed central air conditioner. The control method is based on basic judgment to the essence of things, all tail end branch FCU controllers in the system are formed by intelligent DDC digital controllers or intelligent temperature controllers, distributed control is implemented to tail end FCUs independently, and intelligent PID controllers are arranged in the tail end FCU controllers; the feedback closed-loop automatic control technology is adopted so as to reduce uncertainty; and the actual value of the controlled temperature variable is measured and is compared with a user set value, the deviation of the actual value and the user set value is calculated to correct system responses, and the aim of controllingthe flow q of cold water flowing through a cold coiled pipe is achieved by adjusting and controlling the opening degree of a temperature control adjusting valve. On the premise of meeting the user air conditioner service quality, economic operation management is achieved, energy-saving operation benefits are acquired, meanwhile, the control system is simpler and clearer, operation is rapid and reliable, and the remarkable enegy-saving effect and the actual application meaning are achieved.

The invention discloses a thermal compensation type superheated steam coal drying system. Fault raw coal is broken and screened through a coal breaker, then passes through a coal bunker and then enters a superheated steam fluidized bed, the heat and mass transfer process is carried out inside, then the fault raw coal flows out of the bottom of the superheated steam fluidized bed, and the fault raw coal becomes upgraded coal after passing through a coal cooler. Superheated steam of the superheated steam fluidized bed is from a superheated steam extraction source. Water in the fault raw coal is heated and evaporated in the superheated steam fluidized bed into secondary steam, then the secondary steam is output out of the top of the superheated steam fluidized bed, the secondary steam passes through a circulating fan and then is introduced into the superheated steam fluidized bed to be subjected to heat exchange with the raw coal again, and the secondary steam becomes precipitated water after being condensed. Cooling feedwater introduced into the coal cooler serves as compensation heat source water to be introduced into a waste-heat heat exchanger and a solar heat exchanger through corresponding valves, wherein the waste-heat heat exchanger and the solar heat exchanger are connected in parallel. The waste-heat heat exchanger and the solar heat exchanger are both connected with an electric superheater through valves, and a superheated steam outlet of the electric superheater is connected with the superheated steam extraction source in parallel through a switching valve and then is connected into the superheated steam fluidized bed.

The invention proposes a local power coordinated control system and method of an active power distribution network, and belongs to the technical field of local power coordinated control of the active power distribution network. The local power coordinated control system is based on long-period economic optimized operation of the active power distribution network, the regulation period is short, load change can be effectively and dynamically responded, and the global optimized economic operation of the system also can be satisfied. In the system, a coordinated control strategy for distributed power generation and energy storage of the active power distribution network when a load changes in different situations is fully considered, the output of a distributed power source and a network-side power source can be adaptively adjusted, the active power distribution network can efficiently and economically run by means of power generation capability of the distribution power source, and meanwhile, the residual energy in the system can be reasonably regulated and controlled. By the method, the sharing proportion coefficients of the distributed power source and the network-side power source on the load change can be rapidly and accurately solved, the rapid response of a local system to the load change is achieved, and the safe and economic operation of the system is ensured.

The invention provides a rail transit operation and maintenance management system based on a micro-service architecture, and the system comprises an infrastructure-as-service layer, which provides rail transit business data for an application-as-service layer, through a deployed first micro-service, and responds to an operation and maintenance management control instruction; and the application-as-service layer which calls a second micro-service correspondingly deployed by a service module associated with the rail transit service data to perform service processing, provides service processinginformation display and operation and maintenance management control instruction operation prompts for the user through the front-end service application, and returns an operation and maintenance management control instruction to the infrastructure-as- service layer. According to the scheme provided by the embodiment of the invention, by reasonably designing the micro-service architecture, key facilities and equipment in rail transit are subjected to omnibearing whole-process management and control, different operation and maintenance requirements of rail transit operation and maintenance management can be met by deploying different micro-services, the management level of operation and maintenance management is improved, and normal, safe and efficient operation of the facilities and equipment is guaranteed.

The invention discloses a multi-FACTS (flexible alternating-current transmission system) structure based chain structure high-voltage grid security control method. The chain structure high-voltage grid security control method mainly comprises establishing a power system model and a dynamic element model on the basis of transient stability; establishing a coordinated optimization model considering coordination among multiple FACTS for the chain structure high-voltage grid on the basis of the power system model and the dynamic element model; and solving the optimal solution of the coordinated optimization model. The multi-FACTS structure based chain structure high-voltage grid security control method can overcome the defects of low reliability, poor coordination and stability and the like in the prior art and has the advantages of high reliability, good coordination and stability.

The invention provides a system and a method for purifying calcium-containing sludge by recycling water quality of a power plant. The system for purifying the calcium-containing sludge by recycling the water quality of the power plant comprises a sludge concentration tank, a desulfurizing agent grinding unit and a desulfurizing agent slurry supply unit, the sludge concentration tank is used for storing calcium-containing sludge from a power plant clarification tank, and the calcium-containing sludge is sent to the desulfurizing agent grinding unit or the desulfurizing agent slurry supply unit; the desulfurizing agent grinding unit is used for circularly grinding a mixed material of limestone and calcium-containing sludge; the desulfurizing agent slurry supply unit is used for storing the calcium-containing sludge or mixed slurry from the sludge concentration tank and the desulfurizing agent grinding unit and sending the calcium-containing sludge or mixed slurry to the desulfurization system to be used as a desulfurizing agent. Compared with the prior art, the calcium-containing sludge is conveyed into the desulfurization system to be used as the desulfurizing agent, so that the calcium-containing sludge is treated and recycled, the transportation and treatment expenses of polyacrylamide chemicals and sludge during dehydration of the calcium-containing sludge are reduced, and the consumption cost of alkaline limestone serving as the desulfurizing agent in the desulfurization system is reduced.

The invention discloses a distributed energy storage aggregation system. The system comprises a micro-grid control unit and an energy unit, wherein the micro-grid control unit comprises a micro-grid control center, an information acquisition device, a communication device, a static switch, a plurality of electric operation switches and a circuit breaker; the load unit and the energy unit are connected with an alternating current bus through an electric operation switch, the alternating current bus is connected with a power grid through a static switch and a circuit breaker; and the micro-grid control center is connected with an electric operation switch, a circuit breaker, an information acquisition device, a communication device and an energy unit vector. The system is advantaged in that reasonably planned distributed energy storage can not only reduce the capacity of distribution network and peak valley arbitrage through peak cutting and valley filling, negative influence of the randomness of distributed energy storage on the safety of the power grid can be made up, and the load unit and the energy unit are correspondingly controlled through different connection states with the power grid, so a purpose of efficient, safe and economical operation is achieved.

The invention belongs to the technical field of energy-saving and environment-friendly equipment and particularly relates to an oil-containing pollutant treatment system capable of realizing energy-saving control by using PID (Proportion Integration Differentiation) to adjust constant pressure. The oil-containing pollutant treatment system comprises a nitrogen making machine, a nitrogen tank, a first electric adjusting valve, a second electric adjusting valve, a third electric adjusting valve, a fourth electric adjusting valve, a first pyrolyzing furnace, a second pyrolyzing furnace, a first micro-differential-pressure transmitter, a second micro-differential-pressure transmitter, a third micro-differential-pressure transmitter, a fourth micro-differential-pressure transmitter, a bufferingtank group, a boosting pump, a noncondensable-gas buffering tank, an electric switch valve and a PID controller. The oil-containing pollutant treatment system has the beneficial effects that after high-temperature anaerobic reaction of oil-containing pollutant particles, water, oil or organic matters such as polyaromatic hydrocarbon are phase-changed to be vaporized so as to be separated from solids, and solid-phase slags are treated by a closed dry type deslagging technology; gases failed to be condensed by the oil gas are conveyed into the pyrolyzing furnace for environment-friendly reburning after being pressure-stabilized by the boosting pump; the energy consumption can be reduced, the efficiency can be improved, the safety risk can be reduced and the operation is reliable.