CN103647345B - Micro source controller and realize also/from the method for network control - Google Patents
Micro source controller and realize also/from the method for network control Download PDFInfo
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- CN103647345B CN103647345B CN201310228130.6A CN201310228130A CN103647345B CN 103647345 B CN103647345 B CN 103647345B CN 201310228130 A CN201310228130 A CN 201310228130A CN 103647345 B CN103647345 B CN 103647345B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention provides a kind of micro source controller and realize also/from the method for network control, micro source controller comprises communication module and control module, and described control module comprises measurement module and control module; Described communication module is connected with described control module and micro-capacitance sensor central controller, and described measurement module is connected with the micro battery outlet line in described control module and micro-grid system; Control module, according to the control command of the actual conditions of local device information and micro-capacitance sensor central controller, under determining which kind of operational mode micro-grid system is in, realizes the control to also/off-grid switching and local device automatically.The invention provides real-time micro battery to control, guarantee that micro-grid system is at the Dynamic Matching from micro battery under network operation pattern and customer charge power, improve stability and the reliability of micro-capacitance sensor.
Description
Technical field
The invention belongs to micro battery and micro-capacitance sensor control technology field, be specifically related to micro source controller and use micro source controller realize micro-capacitance sensor and public electric wire net also/from the method for network control.
Background technology
Renewable energy power generation (as photovoltaic generation, wind power generation) is the important channel obtaining electric energy, and their distributed shunt, on traditional power line, provide energy to user.But the distributed power source along with One's name is legion accesses existing power distribution network, the passive power distribution network of conventional radiation shape will produce the change of essence, and these changes bring threat by giving the safe and reliable operation of power distribution network.In order to coordinate the contradiction between power distribution network and distributed power source, making full use of distributed power source is the value brought of electrical network and user and benefit, and at the beginning of 21 century, some experts and scholars propose the concept of micro power network, correspondingly the distributed power source in micro-capacitance sensor is called micro power, is called for short micro-source.
Distributed power source, load, energy storage and various controller combine by micro-capacitance sensor, form a single controlled unit, simultaneously to user's supply of electrical energy and heat energy.It does not change existing distribution network structure, by eliminating distributed power source to the impact of conventional electrical distribution net to the management of the distributed power generation power supply in net and load, play the application potential of distributed power source better, its correlation technique obtains the attention of a lot of country of the world.
Micro-capacitance sensor needs one of key issue solved to be exactly control problem in actual motion.The various complexity of micro battery in micro-capacitance sensor, and there is stand-alone capability, it can realize the function of plug and play and seamless switching, and relative bulk power grid can be used as one can the autonomous system of teaching display stand control and management, and the control strategy which results in micro-capacitance sensor is more complicated.
At present, though some countries have carried out micro-capacitance sensor research, only completed the fundamental research of micro-capacitance sensor abroad, solved that micro-capacitance sensor runs, protection and the Issues of Basic Theory of economic analysis; Although the domestic research to micro-capacitance sensor makes some progress, but the huge research team be made up of research institution, manufacturer and Utilities Electric Co. with Europe, the U.S. and Japan etc. compares, still there is with it larger gap in China in research effort with the achievement obtained.In addition, both at home and abroad the research of micro source controller in micro-capacitance sensor was focused mostly in theoretical research and simulation analysis stage.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind of micro source controller and realize also/from the method for network control, real-time micro battery is provided to control, guarantee that micro-grid system is at the Dynamic Matching from micro battery under network operation pattern and customer charge power, improve stability and the reliability of micro-capacitance sensor.
Micro source controller provided by the present invention, comprises communication module and control module, and described control module comprises measurement module and control module; Described communication module is connected with described control module and micro-capacitance sensor central controller, and described measurement module is connected with the micro battery outlet line in described control module and micro-grid system;
Current signal, for detecting the voltage and current on micro battery outlet line, is converted to the voltage signal that described control module can process, converts voltage signal to digital quantity by analog quantity, and send digital quantity to described control module by described measurement module;
Described control module be used for by obtain also/send described communication module to from the digital quantity after net switching-state information and wherethrough reason, and receive the control command that sends of micro-capacitance sensor central controller that described communication module transmits, and perform this control command;
Described communication module by receive from described control module also/send micro-capacitance sensor central controller to from net switching-state information and digital quantity, and send the control command that micro-capacitance sensor central controller sends to described control module.
Further, the described measurement module AD sampling module that comprises instrument transformer plate and be connected with described instrument transformer plate; Described instrument transformer plate is connected with the micro battery outlet line in micro-grid system, and described AD sampling module is connected with described control module; Current signal, for detecting the voltage and current on micro battery outlet line, is converted to the voltage signal that described control module can process by described instrument transformer plate, and is sent to described AD sampling module; Described AD sampling module is used for the voltage signal received from described instrument transformer plate to be converted to digital quantity by analog quantity, and sends this digital quantity to described control module.
Further, described control module adopts DSP control treatment module; DSP control treatment module carries out frequency measurement to received digital quantity, calculates active power, reactive power and power angle, and also/control from the double mode switching of net, meritorious/idle control and constant voltage/constant frequency;
When micro-grid system is from being incorporated into the power networks to when switching from Running State, described DSP control treatment module receives the control command that micro-capacitance sensor central controller sends, and control inverter using the amplitude of voltage given for micro-capacitance sensor central controller and phase place as the amplitude during the voltage close loop under Running State controls and reference phase, inverter is controlled by voltage close loop subsequently, output voltage is made progressively to rise to load voltage rated value, described DSP control treatment module controls inverter by gaining merit/idle control switches to voltage/frequency and controls, and regulate along with micro-grid system load change,
When micro-grid system is from when switching from network operation to the state that is incorporated into the power networks, described DSP control treatment module receives control command that micro-capacitance sensor central controller sends and monitors the voltage of micro-grid system, control inverter adopts voltage close loop to control, make output voltage and public electric wire net voltage synchronous, when detecting that inverter output voltage amplitude and phase place are consistent with public electric wire net, described in closed also/from net switch, DSP control treatment module controls inverter is controlled to switch to meritorious/idle control by voltage/frequency;
Described meritorious/idle control refers to, described DSP control treatment module using active power given for the micro-capacitance sensor central controller that receives, reactive power as input variable, by active power, reactive power decoupling zero, through pi regulator for Current Control component provides reference value, current error signal is for inverter provides pulse-width signal under pi regulator effect, and control inverter exports active power, the reactive power of specifying;
Described voltage/frequency controls to refer to, described DSP control treatment module using voltage given for the micro-capacitance sensor central controller that receives, frequency as input variable, control inverter output voltage, frequency-invariant.
Further, described DSP control treatment module is before performing the control command that micro-capacitance sensor central controller sends, described DSP control treatment module carries out Effective judgement according to local actual conditions to the control command that micro-capacitance sensor central controller sends, if this control command not accept by micro battery, then do not perform this control command.DSP control treatment module is according to the local information gathered and the central controller controls instruction received, under determining which kind of operational mode micro-grid system is in, the switching of automatic realization to operational mode and the relevant control of local device, to guarantee local local voltage stabilization.
Further, described communication module is CAN communication module.Externally connected by CAN, effectively can support distributed AC servo system or control in real time.
The present invention also provide a kind of use micro source controller realize micro-capacitance sensor and public electric wire net also/from the method for network control, it is characterized in that, comprise the following steps:
(1) voltage and current on micro battery outlet line is detected by the measurement module of micro source controller, current signal is converted to the voltage signal that described control module can process, convert voltage signal to digital quantity by analog quantity, and send digital quantity to described control module;
(2) control module of micro source controller obtain also/from net switching-state information, and will also/send micro-capacitance sensor central controller from net switching-state information and digital quantity to by communication module;
(3) micro-capacitance sensor central controller according to receive also/from net switching-state information and digital quantity, sending controling instruction give described micro source controller;
(4) described control module obtains control command by described communication module, and performs this control command.
Further, described step (1) is specially: the AD sampling module that described measurement module comprises instrument transformer plate and is connected with described instrument transformer plate; Detect the voltage and current on micro battery outlet line by instrument transformer plate, current signal is converted to the voltage signal that described control module can process, and is sent to described AD sampling module; The voltage signal received from described instrument transformer plate is converted to digital quantity by analog quantity by described AD sampling module, and sends this digital quantity to described control module.
Further, described control module is DSP control treatment module; Described step (4) is further divided into:
A. cutting-in control process: when micro-grid system is from being incorporated into the power networks to when switching from Running State, described DSP control treatment module receives the control command that micro-capacitance sensor central controller sends, and control inverter using the amplitude of voltage given for micro-capacitance sensor central controller and phase place as the amplitude during the voltage close loop under Running State controls and reference phase, inverter is controlled by voltage close loop subsequently, output voltage is made progressively to rise to load voltage rated value, described DSP control treatment module controls inverter by gaining merit/idle control switches to voltage/frequency and controls, and regulate along with micro-grid system load change,
B. when micro-grid system is from when switching from network operation to the state that is incorporated into the power networks, described DSP control treatment module receives control command that micro-capacitance sensor central controller sends and monitors the voltage of micro-grid system, control inverter adopts voltage close loop to control, make output voltage and public electric wire net voltage synchronous, when detecting that inverter output voltage amplitude and phase place are consistent with public electric wire net, described in closed also/from net switch, DSP control treatment module controls inverter is controlled to switch to meritorious/idle control by voltage/frequency;
Wherein,
Described meritorious/idle control refers to: described DSP control treatment module using active power given for the micro-capacitance sensor central controller that receives, reactive power as input variable, by active power, reactive power decoupling zero, through pi regulator for Current Control component provides reference value, current error signal is for inverter provides pulse-width signal under pi regulator effect, and control inverter exports active power, the reactive power of specifying;
Described voltage/frequency controls to refer to: described DSP control treatment module using voltage given for the micro-capacitance sensor central controller that receives, frequency as input variable, control inverter output voltage, frequency-invariant.
Further, described DSP control treatment module is before performing the control command that micro-capacitance sensor central controller sends, described DSP control treatment module carries out Effective judgement according to local actual conditions to the control command that micro-capacitance sensor central controller sends, if this control command not accept by micro battery, then do not perform this control command.
Beneficial effect of the present invention is: (1) and micro-capacitance sensor central controller carry out information exchange, and the active power regulating micro battery to export according to the instruction of micro-capacitance sensor central controller and reactive power, improve stability and the quality of power supply of system; (2) effectively can judge the instruction of micro-capacitance sensor central controller, improve the stability that micro-grid system runs; (3) externally connected by CAN, effectively can support distributed AC servo system or control in real time; (4) to the grid integration of distributed energy, there is impetus, on the one hand under current policies and technical conditions, actively push forward the grid integration of new forms of energy, on the other hand, along with becoming better and approaching perfection day by day and the progressively development of micro-capacitance sensor control technology of energy policy, its functions expanding can be completed smoothly in existing theoretical research and hardware foundation, thus realize distributed energy and access micro-capacitance sensor smoothly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the micro grid control system using micro source controller of the present invention.
Fig. 2 is the information flow schematic diagram that micro battery of the present invention controls between micro-capacitance sensor central controller.
Fig. 3 is/idle (P/Q) control block diagram of gaining merit of the present invention.
Fig. 4 is voltage/frequency of the present invention (U/f) control principle drawing.
Fig. 5 is voltage/frequency of the present invention (U/f) control principle drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present invention includes communication module and control module, control module comprises measurement module and control module; Communication module is connected with control module and micro-capacitance sensor central controller, and measurement module is connected with the micro battery outlet line in control module and micro-grid system; Current signal, for detecting the voltage and current on micro battery outlet line, is converted to the voltage signal that control module can process, converts voltage signal to digital quantity by analog quantity, and send digital quantity to control module by measurement module; Control module be used for by obtain also/send communication module to from the digital quantity after net switching-state information and wherethrough reason, and the control command that sends of micro-capacitance sensor central controller that received communication module transmits, and perform this control command; Communication module by receive from control module also/send micro-capacitance sensor central controller to from net switching-state information and digital quantity, and send the control command that micro-capacitance sensor central controller sends to control module.Communication module can adopt CAN communication module, effectively can support distributed AC servo system or control in real time.
The AD sampling module that measurement module specifically comprises instrument transformer plate and is connected with instrument transformer plate, instrument transformer plate is connected with the micro battery outlet line in micro-grid system, and AD sampling module is connected with control module; Current signal, for detecting the voltage and current on micro battery outlet line, is converted to the voltage signal that control module can process by instrument transformer plate, and is sent to AD sampling module; AD sampling module is used for the voltage signal received from described instrument transformer plate to be converted to digital quantity by analog quantity, and sends this digital quantity to control module.
Control module is specially DSP control treatment module, can carry out frequency measurement to received digital quantity, calculates active power, reactive power and power angle, and also/control from the double mode switching of net, meritorious/idle control and constant voltage/constant frequency.
When micro-grid system is from being incorporated into the power networks to when switching from Running State, DSP control treatment module receives the control command that micro-capacitance sensor central controller sends, and control inverter using the amplitude of voltage given for micro-capacitance sensor central controller and phase place as the amplitude during the voltage close loop under Running State controls and reference phase, inverter is controlled by voltage close loop subsequently, output voltage is made progressively to rise to load voltage rated value, DSP control treatment module controls inverter by gaining merit/idle control switches to voltage/frequency and controls, and regulate along with micro-grid system load change,
When micro-grid system is from when switching from network operation to the state that is incorporated into the power networks, DSP control treatment module receives control command that micro-capacitance sensor central controller sends and monitors the voltage of micro-grid system, control inverter adopts voltage close loop to control, make output voltage and public electric wire net voltage synchronous, when detecting that inverter output voltage amplitude and phase place are consistent with public electric wire net, described in closed also/from net switch, DSP control treatment module controls inverter is controlled to switch to meritorious/idle control by voltage/frequency.
DSP control processor is according to the local information gathered and the micro-capacitance sensor central controller controls instruction received, under determining which kind of operational mode micro-grid system is in, the switching of automatic realization to operational mode and the relevant control of local device, to guarantee local local voltage stabilization; DSP control processor can carry out the judgement of validity to the control command of micro-capacitance sensor central controller according to the actual conditions of local information, if the instruction that micro-capacitance sensor central controller sends is not accepted by local microenvironment power supply, then can not perform this instruction.
Fig. 2 is the information flow cardon between micro source controller provided by the present invention and micro-capacitance sensor central controller, micro source controller gathers the output voltage of micro battery in micro-grid system by instrument transformer plate, output current, AD sampling module is sampled to the information that instrument transformer plate obtains, be converted into digital quantity, DSP control treatment module is transferred to process, DSP control treatment module exports the micro battery line information (output voltage of micro battery collected, electric current and switching-state information), micro-capacitance sensor central controller is sent to by CAN communication module, and receive control command (switching control instruction and the power of micro-capacitance sensor central controller, voltage setting value).
Fig. 3 be the present invention meritorious/idle (P/Q) control block diagram.Meritorious/idle (P/Q) controls use and presets value and power reference (being provided by micro-capacitance sensor central controller) as input variable.As can be known from Fig. 3, P/Q control strategy is by meritorious, reactive power decoupling zero, through pi regulator for Current Control component provides reference value, current error signal under pi regulator effect for inverter provides pulse-width signal.Control circuit application three-phase phase-locked loop PLL follows the tracks of the phase angle of major network voltage, for control system provides frequency to support.P/Q control strategy is applicable to be incorporated into the power networks and can stablizes the distributed generation unit of power output.
Fig. 4, Fig. 5 are constant voltage/constant frequency (U/f) control principle drawings in the present invention.The voltage of inverter and FREQUENCY CONTROL providing strong voltage and frequency to support from network operation and there is the following feature of certain load power mainly for micro-capacitance sensor.Droop characteristic according to Fig. 4, Fig. 5, when micro-grid load changes, will cause frequency and voltage to fluctuate, and its fluctuation situation will depend on the U/f susceptibility of droop characteristic and load.Make the U/f of micro-capacitance sensor return to rated value, then need the output regulating micro battery.Shown in Fig. 4, Fig. 5, namely the FREQUENCY CONTROL of micro-capacitance sensor is regulate the output in micro-source to make micro-capacitance sensor frequency retrieval to rated value.Ensure that frequency is at a steady state value by travel frequency sagging curve parallel to the left or to the right.Similarly, voltage control maintains microgrid voltage at a steady state value by regulation voltage characteristic to the left or to the right.
Use micro source controller provided by the present invention realize micro-capacitance sensor and public electric wire net also/from the method for network control, comprise the following steps:
(1) voltage and current on micro battery outlet line is detected by the measurement module of micro source controller, current signal is converted to the voltage signal that described control module can process, convert voltage signal to digital quantity by analog quantity, and send digital quantity to described control module;
(2) control module of micro source controller obtain also/from net switching-state information, and will also/send micro-capacitance sensor central controller from net switching-state information and digital quantity to by communication module;
(3) micro-capacitance sensor central controller according to receive also/from net switching-state information and digital quantity, sending controling instruction give described micro source controller;
(4) control module obtains control command by communication module, and performs this control command.
The voltage and current on instrument transformer plate detection micro battery outlet line can be used, current signal is converted to the voltage signal that control module can process, and is sent to AD sampling module; The voltage signal received from instrument transformer plate is converted to digital quantity by analog quantity by AD sampling module, and sends this digital quantity to control module.
Control module adopts DSP control treatment module; Step (4) is further divided into:
A. cutting-in control process: when micro-grid system is from being incorporated into the power networks to when switching from Running State, described DSP control treatment module receives the control command that micro-capacitance sensor central controller sends, and control inverter using the amplitude of voltage given for micro-capacitance sensor central controller and phase place as the amplitude during the voltage close loop under Running State controls and reference phase, inverter is controlled by voltage close loop subsequently, output voltage is made progressively to rise to load voltage rated value, described DSP control treatment module controls inverter by gaining merit/idle control switches to voltage/frequency and controls, and regulate along with micro-grid system load change,
B. when micro-grid system is from when switching from network operation to the state that is incorporated into the power networks, described DSP control treatment module receives control command that micro-capacitance sensor central controller sends and monitors the voltage of micro-grid system, control inverter adopts voltage close loop to control, make output voltage and public electric wire net voltage synchronous, when detecting that inverter output voltage amplitude and phase place are consistent with public electric wire net, described in closed also/from net switch, DSP control treatment module controls inverter is controlled to switch to meritorious/idle control by voltage/frequency.
Before the control command that DSP control treatment module execution micro-capacitance sensor central controller sends, described DSP control treatment module carries out Effective judgement according to local actual conditions to the control command that micro-capacitance sensor central controller sends, if this control command not accept by micro battery, then do not perform this control command.
Although the present invention is with preferred embodiment openly as above, they are not for limiting the present invention, anyly haveing the knack of this those skilled in the art, without departing from the spirit and scope of the invention, from when making various changes or retouch, but same within protection scope of the present invention.What therefore protection scope of the present invention should define with the claims of the application is as the criterion.
Claims (7)
1. a micro source controller, is characterized in that, comprises communication module and control module, and described control module comprises measurement module and control module; Described communication module is connected with described control module and micro-capacitance sensor central controller, and described measurement module is connected with the micro battery outlet line in described control module and micro-grid system;
Current signal, for detecting the voltage and current on micro battery outlet line, is converted to the voltage signal that described control module can process, converts voltage signal to digital quantity by analog quantity, and send digital quantity to described control module by described measurement module;
Described control module be used for by obtain also/send described communication module to from the digital quantity after net switching-state information and wherethrough reason, and receive the control command that sends of micro-capacitance sensor central controller that described communication module transmits, and perform this control command;
Described communication module by receive from described control module also/send micro-capacitance sensor central controller to from net switching-state information and digital quantity, and send the control command that micro-capacitance sensor central controller sends to described control module;
Described control module is DSP control treatment module; Described DSP control treatment module carries out frequency measurement to received digital quantity, calculates active power, reactive power and power angle, and also/control from the double mode switching of net, meritorious/idle control and constant voltage/constant frequency;
When micro-grid system is from being incorporated into the power networks to when switching from Running State, described DSP control treatment module receives the control command that micro-capacitance sensor central controller sends, and control inverter using the amplitude of voltage given for micro-capacitance sensor central controller and phase place as the amplitude during the voltage close loop under Running State controls and reference phase, inverter is controlled by voltage close loop subsequently, output voltage is made progressively to rise to load voltage rated value, described DSP control treatment module controls inverter by gaining merit/idle control switches to voltage/frequency and controls, and regulate along with micro-grid system load change,
When micro-grid system is from when switching from network operation to the state that is incorporated into the power networks, described DSP control treatment module receives control command that micro-capacitance sensor central controller sends and monitors the voltage of micro-grid system, control inverter adopts voltage close loop to control, make output voltage and public electric wire net voltage synchronous, when detecting that inverter output voltage amplitude and phase place are consistent with public electric wire net, described in closed also/from net switch, DSP control treatment module controls inverter is controlled to switch to meritorious/idle control by voltage/frequency;
Described meritorious/idle control refers to, described DSP control treatment module using active power given for the micro-capacitance sensor central controller that receives, reactive power as input variable, by active power, reactive power decoupling zero, through pi regulator for Current Control component provides reference value, current error signal is for inverter provides pulse-width signal under pi regulator effect, and control inverter exports active power, the reactive power of specifying;
Described voltage/frequency controls to refer to, described DSP control treatment module using voltage given for the micro-capacitance sensor central controller that receives, frequency as input variable, control inverter output voltage, frequency-invariant.
2. micro source controller as claimed in claim 1, is characterized in that, the AD sampling module that described measurement module comprises instrument transformer plate and is connected with described instrument transformer plate; Described instrument transformer plate is connected with the micro battery outlet line in micro-grid system, and described AD sampling module is connected with described control module; Current signal, for detecting the voltage and current on micro battery outlet line, is converted to the voltage signal that described control module can process by described instrument transformer plate, and is sent to described AD sampling module; Described AD sampling module is used for the voltage signal received from described instrument transformer plate to be converted to digital quantity by analog quantity, and sends this digital quantity to described control module.
3. micro source controller as claimed in claim 1 or 2, it is characterized in that, described DSP control treatment module is before performing the control command that micro-capacitance sensor central controller sends, described DSP control treatment module carries out Effective judgement according to local actual conditions to the control command that micro-capacitance sensor central controller sends, if this control command not accept by micro battery, then do not perform this control command.
4. micro source controller as claimed in claim 1 or 2, it is characterized in that, described communication module is CAN communication module.
5. use micro source controller realize micro-capacitance sensor and public electric wire net also/from the method for network control, it is characterized in that, comprise the following steps:
(1) voltage and current on micro battery outlet line is detected by the measurement module of micro source controller, current signal is converted to the voltage signal that control module can process, convert voltage signal to digital quantity by analog quantity, and send digital quantity to described control module;
(2) control module of micro source controller obtain also/from net switching-state information, and will also/send micro-capacitance sensor central controller from net switching-state information and digital quantity to by communication module;
(3) micro-capacitance sensor central controller according to receive also/from net switching-state information and digital quantity, sending controling instruction give described micro source controller;
(4) described control module obtains control command by described communication module, and performs this control command;
Described control module is DSP control treatment module; Described step (4) is further divided into:
A. cutting-in control process: when micro-grid system is from being incorporated into the power networks to when switching from Running State, described DSP control treatment module receives the control command that micro-capacitance sensor central controller sends, and control inverter using the amplitude of voltage given for micro-capacitance sensor central controller and phase place as the amplitude during the voltage close loop under Running State controls and reference phase, inverter is controlled by voltage close loop subsequently, output voltage is made progressively to rise to load voltage rated value, described DSP control treatment module controls inverter by gaining merit/idle control switches to voltage/frequency and controls, and regulate along with micro-grid system load change,
B. when micro-grid system is from when switching from network operation to the state that is incorporated into the power networks, described DSP control treatment module receives control command that micro-capacitance sensor central controller sends and monitors the voltage of micro-grid system, control inverter adopts voltage close loop to control, make output voltage and public electric wire net voltage synchronous, when detecting that inverter output voltage amplitude and phase place are consistent with public electric wire net, described in closed also/from net switch, DSP control treatment module controls inverter is controlled to switch to meritorious/idle control by voltage/frequency;
Wherein,
Described meritorious/idle control refers to, described DSP control treatment module using active power given for the micro-capacitance sensor central controller that receives, reactive power as input variable, by active power, reactive power decoupling zero, through pi regulator for Current Control component provides reference value, current error signal is for inverter provides pulse-width signal under pi regulator effect, and control inverter exports active power, the reactive power of specifying;
Described voltage/frequency controls to refer to, described DSP control treatment module using voltage given for the micro-capacitance sensor central controller that receives, frequency as input variable, control inverter output voltage, frequency-invariant.
6. as claimed in claim 5 use micro source controller realize micro-capacitance sensor and public electric wire net also/from the method for network control, it is characterized in that, described step (1) is specially: the AD sampling module that described measurement module comprises instrument transformer plate and is connected with described instrument transformer plate; Detect the voltage and current on micro battery outlet line by instrument transformer plate, current signal is converted to the voltage signal that described control module can process, and is sent to described AD sampling module; The voltage signal received from described instrument transformer plate is converted to digital quantity by analog quantity by described AD sampling module, and sends this digital quantity to described control module.
7. the use micro source controller as described in claim 5 or 6 realize micro-capacitance sensor and public electric wire net also/from the method for network control, it is characterized in that, described DSP control treatment module is before performing the control command that micro-capacitance sensor central controller sends, described DSP control treatment module carries out Effective judgement according to local actual conditions to the control command that micro-capacitance sensor central controller sends, if this control command not accept by micro battery, then do not perform this control command.
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| CN109962494B (en) * | 2017-12-26 | 2021-02-19 | 北京天诚同创电气有限公司 | Intelligent switch device, control system and control method for micro-grid |
| CN108063458A (en) * | 2018-01-24 | 2018-05-22 | 国网江苏省电力有限公司苏州供电分公司 | A kind of micro-capacitance sensor plug-and-play apparatus |
| TWI697167B (en) * | 2018-09-21 | 2020-06-21 | 旭隼科技股份有限公司 | Hybrid grid power energy storage circuit and method thereof |
| CN111049145B (en) * | 2019-12-27 | 2024-02-13 | 郑州众智科技股份有限公司 | Control method for realizing reliable switching between parallel and off-grid of micro-grid and public grid |
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