Scheduling system for smart energy

Abstract

The invention relates to the technical field of energy, and discloses a smart energy dispatching system which comprises a smart energy dispatching command center, a 66kV transformer substation, a 220kV booster station, a step-down station, a 220kV power transmission line, a 66kV power transmission line, a power system network architecture and distribution network automatic construction, and the matched construction capacity is 100MW / 400MWh. According to the intelligent energy dispatching system, the intelligent energy dispatching system is accessed for monitoring and control, full-time analysis is carried out on a new energy power generation curve and a load power consumption curve, load adjustment is automatically carried out, intelligent dispatching is achieved on power flow in the system, safe, efficient and stable operation of a power system is achieved, and about 21 hundreds of millions of kilowatt-hours of green power can be provided every year; according to the invention, local consumption in a novel electric power system is completely realized, the replacement proportion of clean energy exceeds 50%, and meanwhile, standard coal can be saved by 64.080 tons every year, and carbon dioxide emission is reduced by 201.63 thousand tons every year. And the power utilization cost of enterprises is further reduced, and the power service and power supply level of high and new areas is improved.

Description

Technical Field

[0001] The present invention relates to the field of energy technology, and in particular to a smart energy dispatching system. Background Art

[0002] Compared with traditional power systems, integrated energy systems involve multiple energy types and have stronger load uncertainty. In order to cope with the impact of uncertainty on scheduling plans and ensure the safety and economy of integrated energy systems, it is necessary to study a multi-energy coordinated optimization scheduling architecture based on hierarchical model predictive control.

[0003] With the development of society, the load on the power grid continues to rise. During peak hours, the power grid's power generation is difficult to meet the power demand. The peak-shaving and frequency regulation problems faced by the power grid are becoming more and more severe. In the process of energy dispatching, there is a large demand for electricity in the end point, and the electricity is not supplied in time, which will cause the electricity to accumulate in one place, resulting in energy not being regulated in time, resulting in a large amount of wind and solar abandonment, leading to energy waste. In addition, when the output of new energy stations is insufficient, the energy field cannot be powered in time, which will lead to insufficient power supply and affect the use effect. So far, we have proposed a smart energy dispatching system. Summary of the invention

[0004] In view of the shortcomings of the existing smart energy scheduling system, the present invention provides a smart energy scheduling system, which has the advantage of effectively avoiding untimely resource scheduling and resulting waste of power resources by designing the scheduling system, and solves the problems raised in the above background technology.

[0005] The present invention provides the following technical solutions: a dispatching system for smart energy, the dispatching system comprising a smart energy dispatching command center, a 66kV substation and a 220kV booster station, a step-down station, a 220kV transmission line, a 66kV transmission line and a power system network architecture and distribution network automation construction, with a supporting construction capacity of 100MW / 400MWh;

[0006] The smart dispatching and commanding center includes a rapid coordination and control master station and an integrated dispatching system master station. The smart dispatching and commanding center includes unit systems, wind power, photovoltaics, energy storage devices and load management devices. The step-down station is based on event emergency stability control and rapid power control. The emergency stability control mode and fault judgment can cut power supply, load aggregation and optimize cutting of machines and loads. Rapid power control can aggregate and adjust resource allocation and contact closure control. The optimized control system adopts hierarchical comprehensive regulation.

[0007] The specific operation mode of the dispatching system includes the integrated coordination control method of the whole time scale, the dynamic connection pool management technology, the distributed modeling of the real-time database, the network layer information interception technology and the network layer information interception technology.

[0008] Preferably, hierarchical comprehensive control issues dispatch quality through the power grid and controls load power forecasts, including power trading plans and day-ahead plans.

[0009] Preferably, the unit system specifically includes unit switching and unit regulation, wind power includes wind power switching and wind power management, photovoltaic includes photovoltaic switching and photovoltaic optimization, energy storage includes PMS and EMS, and the load management device includes load switching and load management, wherein emergency stability control drives unit switching, wind power switching, photovoltaic switching, PMS and load switching, and rapid power control drives unit regulation, wind power management, photovoltaic optimization, EMS and load management.

[0010] Preferably, the full-time-scale integrated coordinated control method consists of converter network control for instantaneous response, rapid coordinated control for response at the level of 100 milliseconds to 10 seconds, and multi-constrained steady-state optimization control for response at the level of minutes.

[0011] Preferably, the scalable and flexible architecture of the dynamic connection pool management technology distributes applications according to their characteristics to form an application server cluster for operation.

[0012] Preferably, the distributed modeling and unified definition of the real-time database build a unified and complete power system model.

[0013] Preferably, the network layer information interception technology is used, and the transmission of data and files across security zones is uniformly processed by the supporting platform.

[0014] Preferably, integrated version management techniques control the consistency of application and data schemas, models and graphs.

[0015] Compared with the existing smart energy dispatching system, the present invention has the following beneficial effects:

[0016] 1. The smart energy dispatching system uses "frequency zoning" + "multi-level frequency modulation" to perform frequency zoning according to the frequency deviation value caused by the disturbance, and constructs network energy storage frequency modulation (level 1) + wind power and photovoltaic fast frequency modulation (level 2) + precise machine cutting and load shedding (level 3), and coordinates control with different deviations and different time scales to ensure the stability of the system frequency; the network control 0+ moment instantaneous support maintains the potential angle and amplitude without sudden changes, maintains resilience for a certain period of time, and the inertia support within 100 milliseconds suppresses the system frequency and voltage change rate; through load-side resource aggregation and regulation technology, the source-load interaction capability is improved; the energy storage system is fully utilized to avoid large-scale wind and solar abandonment at new energy sites, and the system is continuously and stably powered when the output of new energy sites is insufficient, thereby further increasing the proportion of green electricity.

[0017] 2. The smart energy dispatching system, through the wind, solar, thermal and storage coordinated optimization dispatching model considering safety, economy and new energy consumption, grasps the peak and frequency regulation characteristics of thermal power units, new energy power generation characteristics, electrolytic aluminum load, and large-scale energy storage characteristics, and establishes a coordinated and complementary model of wind, solar, thermal and storage, the lowest electricity cost and the maximum consumption of new energy.

[0018] 3. The smart energy dispatching system monitors and controls the new energy dispatching system, analyzes the new energy generation curve and load power curve all the time, automatically adjusts the load, and realizes intelligent dispatching of the flow in the system, so as to realize the safe, efficient and stable operation of the power system. It can provide about 2.1 billion kWh of green electricity each year, which can be fully consumed in the new power system. The proportion of clean energy substitution will exceed 50%, and it can save 640,800 tons of standard coal and reduce carbon dioxide emissions by 2.0163 million tons each year. It will further reduce the electricity cost of enterprises and improve the power service and power supply level of the high-tech zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of coordinated optimization control of the present invention;

[0020] Figure 2 This is a schematic diagram of voltage change state of the present invention;

[0021] Figure 3 Schematic diagram of the scheduling system of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 , Figure 2 , Figure 3 , a dispatching system for smart energy, the dispatching system includes a smart energy dispatching command center, a 66kV substation and a 220kV booster station, a step-down station, a 220kV transmission line, a 66kV transmission line and a power system network architecture and distribution network automation construction, with a supporting construction capacity of 100MW / 400MWh;

[0024] The intelligent dispatching and commanding center includes a rapid coordination and control master station and an integrated dispatching system master station. The intelligent dispatching and commanding center includes unit systems, wind power, photovoltaics, energy storage devices and load management devices. The step-down station is based on event emergency stability control and rapid power control. Emergency stability control methods and fault judgment can cut power supply, load aggregation optimization cutting, load cutting, rapid power control can adjust resource aggregation and adjust resource allocation and contact closed control. The optimization control system adopts hierarchical comprehensive control; by developing new control technologies and coordination between multi-time scale controls, the adaptability of the three lines of defense is improved, and multiple goals such as increasing the basic strength of the system and optimizing the solution of power and electricity balance problems are achieved at the same time. A hierarchical distributed architecture system covering the dispatching control layer, rapid coordination control layer, and local control layer is adopted to give full play to the full-time scale response capability of multi-type and multi-object resources in the transient and steady state. The full-time scale response to active frequency changes, the instantaneous response of network control, and the millisecond-level inertia response support the system strength; rapid coordination control has a response of hundreds of milliseconds to seconds, integrating emergency feedforward control and rapid continuous closed-loop control; steady-state optimization control has a minute-level response, and multi-constraint optimization steady-state continuous closed-loop control.

[0025] The specific operation mode of the dispatching system includes an integrated coordinated control method for the entire time scale, dynamic connection pool management technology, distributed modeling of real-time databases, network layer information interception technology and network layer information interception technology, "frequency partitioning" + "multi-level frequency modulation", frequency partitioning according to the frequency deviation value caused by the disturbance, network energy storage frequency modulation (level 1) + wind power and photovoltaic rapid frequency modulation (level 2) + precise machine cutting and load cutting (level 3), coordinated control of different deviations and different time scales to ensure the stability of the system frequency; network control 0+ moment instantaneous support to maintain the potential angle and amplitude without sudden changes, maintain resilience for a certain period of time, and inertia support within 100 milliseconds to suppress the system frequency and voltage change rate; through load-side resource aggregation and regulation technology, the source-load interaction capability is improved; full use of energy storage systems to avoid large-scale wind and solar abandonment at new energy sites, and continuous and stable power supply to the system when the output of new energy sites is insufficient, thereby further increasing the proportion of green electricity.

[0026] See also Figure 1 ,The hierarchical comprehensive control issues the dispatch quality through the power grid and controls the load power forecast, which specifically includes the power trading plan and the day-ahead intraday plan.

[0027] See also Figure 1The unit system specifically includes unit switching and unit regulation, wind power includes wind power switching and wind power management, photovoltaic includes photovoltaic switching and photovoltaic optimization, energy storage includes PMS and EMS, and the load management device includes load switching and load management. Among them, emergency stability control drives unit switching, wind power switching, photovoltaic switching, PMS and load switching, and rapid power control drives unit regulation, wind power management, photovoltaic optimization, EMS and load management. Through the dispatching system, it is convenient to control unit switching and unit regulation, and wind power includes wind power switching and wind power management for regulation.

[0028] See also Figure 3 The integrated coordinated control method of all time scales realizes the effectiveness and adaptability of multi-type resource control through instantaneous response of converter network control, rapid coordinated control of response of hundreds of milliseconds to 10 seconds, and minute-level response of multi-constrained steady-state optimization control, while taking into account local control.

[0029] See also Figure 3 The scalable and flexible architecture of dynamic connection pool management technology distributes applications according to their characteristics, forming application server clusters to improve system reliability and meet the needs of multi-application integrated operation. The dynamic connection pool automatically identifies connection requests from different hardware and operating systems, supports the mixed operation of the same application on heterogeneous servers, has low requirements for hardware servers, and has high distributed processing performance.

[0030] See also Figure 3 The distributed modeling and unified definition of the real-time database have built a unified and complete power system model, providing a technical basis for intelligent scheduling decisions and comprehensive application of power information.

[0031] See also Figure 3 , network layer information interception technology, the support platform uniformly handles the reliable transmission of data and files across security zones, and through network layer information interception technology, the remote control message monitoring and offline power flow analysis functions are realized in the security zone. On the premise of ensuring information security, the application scope of the system is expanded and the debugging and system management of remote systems are facilitated.

[0032] See also Figure 3 The integrated version management technology controls the consistency of application and data modes, models and graphics, and provides a seamless panoramic solution for the application of historical data and future functional expansion of the power system. It proposes a coordinated optimization scheduling model for wind, solar, thermal, storage and utilization that takes into account safety, economy and new energy consumption. It masters the peak and frequency regulation characteristics of thermal power units, new energy power generation characteristics, electrolytic aluminum load, and large-scale energy storage characteristics, and establishes an optimization scheduling model that takes into account the coordinated complementarity of wind, solar, thermal, storage and utilization, the lowest electricity cost and the maximum consumption of new energy, and solves it.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smart energy dispatching system, characterized in that: The dispatching system includes a smart energy dispatching command center, 66kV substation and 220kV booster station, step-down station 220kV transmission line, 66kV transmission line and power system network architecture and distribution network automation construction, with supporting construction capacity of 100MW / 400MWh; The smart dispatching and commanding center includes a rapid coordination and control master station and an integrated dispatching system master station. The smart dispatching and commanding center includes unit systems, wind power, photovoltaics, energy storage devices and load management devices. The step-down station is based on event emergency stability control and rapid power control. The emergency stability control mode and fault judgment can cut power supply, load aggregation and optimize cutting of machines and loads. Rapid power control can aggregate and adjust resource allocation and contact closure control. The optimized control system adopts hierarchical comprehensive regulation. The specific operation methods of the dispatching system include integrated coordination control methods for all time scales, dynamic connection pool management technology, distributed modeling of real-time databases, network layer information interception technology and integrated version management technology.

2. A smart energy dispatching system according to claim 1, characterized in that: Layered comprehensive control determines the dispatch quality through the power grid and controls the load power forecast, which specifically includes power trading plans and day-ahead plans.

3. The smart energy dispatching system according to claim 1, characterized in that: The unit system specifically includes unit switching and unit regulation, wind power includes wind power switching and wind power management, photovoltaic includes photovoltaic switching and photovoltaic optimization, energy storage includes PMS and EMS, and the load management device includes load switching and load management. Among them, emergency stability control drives unit switching, wind power switching, photovoltaic switching, PMS and load switching, and rapid power control drives unit regulation, wind power management, photovoltaic optimization, EMS and load management.

4. The smart energy dispatching system according to claim 1, characterized in that: The full-time-scale integrated coordinated control method consists of converter network control for instantaneous response, rapid coordinated control for response in the range of 100 milliseconds to 10 seconds, and multi-constrained steady-state optimization control for response in the range of minutes.

5. The smart energy dispatching system according to claim 1, characterized in that: The scalable and flexible architecture of the dynamic connection pool management technology distributes applications according to their characteristics and forms an application server cluster for operation.

6. The smart energy dispatching system according to claim 1, characterized in that: The distributed modeling and unified definition of the real-time database construct a unified and complete power system model.

7. The smart energy dispatching system according to claim 1, characterized in that: The network layer information interception technology is supported by a platform that uniformly handles the transmission of data and files across security zones.

8. The smart energy dispatching system according to claim 1, characterized in that: The integrated version management technology controls the consistency of application and data schemas, models and graphs.

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