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Distributed photovoltaic power generation integrated control system

A distributed photovoltaic and distributed power generation technology, applied in the field of control systems, can solve problems such as backward power quality indicators, power quality impact of distribution network, three-phase imbalance, etc., to alleviate power supply congestion, prevent large-scale power outages, maintain Effect of bus voltage levels

Inactive Publication Date: 2014-05-14
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] However, the introduction of distributed generation into the distribution system will also have a negative impact on the power quality of the distribution network.
As the end of the power system, the distribution network is directly connected to users (especially residential users), and its own power quality indicators are relatively backward. After distributed generation is introduced into the power distribution system, its power quality level directly affects the daily life and economy of users. Various power quality problems such as voltage sag, flicker, short-term power interruption, three-phase unbalance and harmonics make power supply blockage and secondary faults more likely to occur
It is also impossible to completely copy the main forms of traditional distribution network power quality adjustment, such as active power filter (APF), static var compensator (SVC), etc., to economically and efficiently solve the power quality of distribution network containing distributed photovoltaic power sources. governance issues

Method used

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Embodiment Construction

[0020] Through the establishment of multiple sets of control terminals and centralized control centers, comprehensive control of the power quality collaborative control of the distribution network with distributed photovoltaic power sources can be achieved. Such as figure 1 As shown, the piezoelectric grid is a 10kV bus, and the low-voltage grid is a 380V bus.

[0021] The distribution network power quality multi-agent control system of distributed photovoltaic power generation is controlled by the control center (Center Agent), the medium voltage distributed power generation control terminal (PV Agent), the medium voltage power quality control equipment (MV Agent), and the low voltage microgrid. Terminal (LVMG), low-voltage power quality control equipment (LV Agent), bus control terminal (Bus Agent) and load control agent (Load Agent), the Center Agent manages multiple Agents, and multiple Agents form a hierarchical structure. Its communication structure is as figure 2 sho...

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Abstract

The invention relates to a distributed photovoltaic power generation integrated control system. A low-voltage microgrid control terminal and a low-voltage power quality control device are accessed into a low-voltage grid, and a medium-voltage power quality control device and a medium-voltage distributed power generation control terminal are accessed into a medium-voltage grid. The distributed photovoltaic power generation integrated control system has the advantages that by means of the distributed photovoltaic power generation integrated control system, a distributed photovoltaic power supply serves as standby energy, power supply blockage can be alleviated, margin of a power distribution network is enlarged, power supply reliability is improved remarkably, controllable idle-work output capability is provided, busbar voltage level is maintained, voltage drop is alleviated, large-area power outage is avoided, and capacity of the existing power quality regulation device can be reduced remarkably when the distributed photovoltaic power generation integrated control system and the existing power quality regulation device of the power distribution network are combined to operate to perform idle-work regulation or harmonic wave inhibition.

Description

technical field [0001] The invention relates to a control system for controlling distributed access photovoltaic power generation equipment. Background technique [0002] The combination of the emerging large power grid and photovoltaic power generation is considered to be an important form of saving investment, reducing energy consumption, improving power supply reliability and flexibility, and realizing scientific energy use. For power supply enterprises with distributed photovoltaic power sources, distributed power generation can comprehensively utilize local advantageous resources to provide users with clean and reliable energy. [0003] However, the introduction of distributed generation into the power distribution system will also have a negative impact on the power quality of the distribution network. As the end of the power system, the distribution network is directly connected to users (especially residential users), and its own power quality indicators are relativ...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/01H02J3/18H02J3/38
CPCY02E10/56Y02E40/10Y02E40/40
Inventor 林其友李卫国任水华蒯圣宇赵武赵锋庞彦李永锋
Owner STATE GRID CORP OF CHINA
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