WO2021185057A1 - 直流组网的发电机组功率分配方法 - Google Patents
直流组网的发电机组功率分配方法 Download PDFInfo
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- WO2021185057A1 WO2021185057A1 PCT/CN2021/078303 CN2021078303W WO2021185057A1 WO 2021185057 A1 WO2021185057 A1 WO 2021185057A1 CN 2021078303 W CN2021078303 W CN 2021078303W WO 2021185057 A1 WO2021185057 A1 WO 2021185057A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J3/02—Driving of auxiliaries from propulsion power plant
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
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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
- Y02E40/30—Reactive power compensation
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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
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Definitions
- the invention relates to a power distribution method of a generator set in a DC group network.
- the technical problem to be solved by the present invention is to provide a power distribution method for generating sets of a DC network that saves energy.
- the technical solution adopted by the present invention is: a generator set in a DC grid power system, including at least two generator power supply mechanisms connected to a DC bus, a main control module, and a generator power supply mechanism Including diesel generators.
- the diesel generators are connected to the circuit breaker, the rectifier power module, and the fuse in turn through the power supply line.
- the power supply line is finally connected to the DC bus.
- the wire between the circuit breaker and the rectifier power module is equipped with a current sensor. There is a DC voltage sensor on the wire between the power module and the fuse.
- the current sensor, rectifier power module, and DC voltage sensor are all electrically connected to the A/D sampling module, and the A/D sampling module is electrically connected to the sub-controller; all The sub-controller is electrically connected to the main control module, and its power distribution method is as follows:
- Step b The main controller continuously detects the total power P t of the DC grid power system.
- the power generation system also starts to work.
- the first diesel generator set starts to work; the sub-controller calculates the first The working power P 1 of a diesel generator set; the alternating current generated by the first diesel generator set passes through the rectification power module, and the rectification parameters of the rectification power module are set to keep the rectified voltage value within V 1min ⁇ V 1max to ensure P 1I ⁇ P 1 ⁇ P 1u ;
- Step d The main controller will determine the working status of all diesel generator sets in turn. If the i-th diesel generator set is in working state, the sub-controller calculates the power P i of the i-th diesel generator set: the AC power generated by the i-th diesel generator set by rectifying the power module, the power module rectifier rectifying the voltage value of the parameter maintained in the rectified V imin ⁇ V imax, to ensure that the P 1I ⁇ P 1 ⁇ P 1u ;
- Step e The main controller will calculate the range of the total optimal working load power of the diesel generator set by the following formula:
- Step f The main controller compares the total power P t of the DC bus with the lower limit P I of the total optimal load power of the diesel generator set and the lower limit P u of the total optimal working load power of the diesel set. If P I ⁇ P t ⁇ P u , Explain that when the total generating power of the diesel unit reaches P t , the generating power of each diesel engine is within the optimal working load power range; at this time, proceed to step (g); if P t does not satisfy P I ⁇ P t ⁇ P u , That is, when P t >P u or P t ⁇ P I , proceed to step (h);
- Step g The main controller performs synchronous control of the diesel engine voltage through the sub-controller according to the cross-coupling control strategy;
- Step h Establish an optimization model to optimize the optimal working sequence of the diesel unit:
- h-6 first calculate That is to calculate the difference between the average optimal working load power of any diesel engine in the working sequence and any diesel engine in the non-working sequence, where
- the above process is the process of solving the optimal working sequence of the diesel engine, that is, finding the maximum P I value P Imax that satisfies P I ⁇ P t ⁇ P u , and the minimum P u value P umax , so that the lower limit of the total optimal working load power of the diesel engine is found P I and the upper limit of the total optimal working load power of the diesel generator set P u are the closest to the total DC bus power P t;
- the process of optimizing the optimal working sequence of the diesel unit is completed.
- the main controller will periodically detect the total DC bus power P t , if P t changes, it will return to step 4, if If P t does not change, the optimization ends, and the diesel engine set will keep the current sequence for work.
- the step g includes the following content:
- the main controller calculates an average voltage V′ according to the total power Pt of the current DC networking system, and when the output voltage of all diesel engines in operation is V′ When, it satisfies P I ⁇ P t ⁇ P u ;
- the main controller After calculating V′, the main controller sends voltage adjustment instructions to each sub-controller;
- the sub-controller After receiving the voltage adjustment instruction from the main controller, the sub-controller controls the rectifier power module to adjust the rectified DC voltage value;
- the A/D conversion module on each power generation circuit will continuously feed back the output voltage of the diesel engine to each sub-controller, and the sub-controller will then send the voltage data to the main controller through the bus;
- the main controller After the main controller obtains the voltage data sent by the sub-controllers of each power generation circuit, it will make the difference between V'and each output voltage respectively, and the main controller will send a voltage compensation signal to each sub-controller according to the voltage difference;
- the sub-controller After receiving the voltage compensation signal from the main controller, the sub-controller again controls the rectifier power module to adjust the rectified DC voltage value;
- step g-7 Go back to step g-4 and execute cyclically.
- the specific calculation method for the sub-controller to calculate the used power P 1 of the first diesel generator set is as follows: the AC current sensor reads the AC power generated by the first diesel generator set I 1 , the voltage sensor detects the rectified DC voltage value V 1 , and the A/D sampling module reads the data of I 1 and V 1 and sends them to the sub-controller, and the sub-controller is based on I 1 and V 1 The AC voltage V AC1 is calculated, and the sub-controller calculates the use power P 1 of the first diesel generator set by the following formula: Where ⁇ is the power factor.
- the specific calculation method for the sub-controller to calculate the power P i of the i-th diesel generator set is as follows: the AC current sensor of the i-th diesel generator set’s power generation circuit will read this diesel generator will generate alternating current I i, the voltage sensor detects a rectified DC voltage value V i, a / D sampling module reads the data I i and V i which is transmitted to the sub-controller, the sub-controller according to I 1 and V 1 calculate the AC voltage V ACi , and the sub-controller calculates the operating power P i of the i-th diesel generator set by the following formula: Where ⁇ is the power factor.
- step g-3 after the sub-controller receives the voltage adjustment instruction from the main controller, it controls the rectifier power module to adjust the rectified DC voltage value.
- the specific operation is as follows: After the voltage adjustment command of the rectifier, it sends a control signal to the A/D sampling module. After the A/D sampling module receives the signal, it sends a PWM wave to the rectifier power module. The PWM wave changes the duty cycle of the IGBT transistor in the rectifier power module to adjust the rectifier. DC voltage value.
- step g-6 after the sub-controller receives the voltage compensation signal from the main controller, it controls the rectifier power module to adjust the rectified DC voltage value again.
- the sub-controller receives the voltage compensation signal from the main controller. After the voltage compensation signal of the controller, it sends a control signal to the A/D sampling module. After receiving the signal, the A/D sampling module sends a PWM wave to the rectifier power module. The PWM wave changes the duty cycle of the IGBT transistor in the rectifier power module to adjust the rectification. The value of the DC voltage.
- the diesel generator set power distribution method takes into account the impact of marine environment changes on the ship's load power and the power consumed by the entire power system, and can accurately obtain the total load power in the operating state of the system in real time, and establish power distribution Optimize the model to accurately determine the relationship between the proportion of diesel generator output power and fuel consumption, improve the accuracy of the power distribution of the generator set, ensure that the generator set runs in the most economical fuel state, improve energy utilization, and reduce energy waste and pollution.
- Figure 1 is a schematic diagram of the circuit structure of the power generation system
- Figure 2 is a schematic diagram of the ship power distribution process
- a generator set in a DC grid power system includes N generator power supply mechanisms connected to a DC bus 9 and a main control module 10.
- the generator power supply mechanism includes a diesel generator 2.
- the diesel generator 2 is connected to the circuit breaker 3, the rectifier power module 5, and the fuse 6 in turn through the power supply line.
- the power supply line is finally connected to the DC bus 9; a current sensor is provided on the wire between the circuit breaker 3 and the rectifier power module 5 4.
- the current sensor 4, the rectifier power module 5, and the DC voltage sensor 7 are all electrically connected to the A/D sampling module 8, and A/D sampling The module 8 is electrically connected to the sub-controller 1; all the sub-controllers 1 are electrically connected to the main control module 10.
- the power distribution method is as follows:
- the main controller 10 will continuously detect the total power P t of the power system of the DC network 9.
- the power generation system will also start working at the same time, and the first diesel generator set will start working; current sensor 4 Read the AC power I 1 generated by the first diesel generator set, the voltage sensor 7 detects the rectified DC voltage value V 1 , and the A/D sampling module 8 reads the data of I 1 and V 1 and sends it to the sub Control module 1.
- the sub-control module 1 calculates the AC voltage V AC1 according to I 1 and V 1 , and the sub-control module 1 calculates the use power P 1 of the first diesel generator set by the following formula:
- the generated alternating current passes through the rectification power module 5, and the rectification parameters of the rectification power module 5 are set to keep the rectified voltage value within V 1min ⁇ V 1max to ensure that P 1I ⁇ P 1 ⁇ P 1u
- V min 1050V
- V max 1100V
- the main controller will determine the working status of all diesel generator sets in turn. If the i-th diesel generator set is in working state, the current sensor 4 of the power generation circuit will read the alternating current I i generated by the diesel generator set, and the voltage sensor 7 after detecting the DC voltage rectified value V i, a / D sampling module 8 reads the data I i and V i which is transmitted to the sub-control module 1, the sub-control module 1 and I 1 is calculated based on an AC voltage V V ACi , the sub-control module 1 then calculates the use power P i of the first diesel generator set by the following formula:
- the generated alternating current passes through the rectification power module 5, and the rectification parameters of the rectification power module 5 are set to keep the rectified voltage value within Vimin ⁇ V imax to ensure that P 1I ⁇ P 1 ⁇ P 1u .
- the main controller 10 will calculate the range of the total optimal working load power of the diesel generator set by the following formula:
- step (g) Comparing with the lower limit P u of the total optimal working load power of the diesel unit, if P I ⁇ P t ⁇ P u , it means that when the total generating power of the diesel set reaches P t , the generating power of each diesel engine is at the optimal working load Within the power range.
- step (g) proceed to step (g), and perform synchronous control of diesel engine voltage according to the cross-coupling control strategy; if P t does not satisfy P I ⁇ P t ⁇ P u , that is, when P t >P u or P t ⁇ P I , proceed Step (h), establish an optimization model to optimize the optimal working sequence of the diesel unit;
- the main controller 10 calculates an average voltage V′ according to the total power Pt of the current DC networking system, and this V′ satisfies: When the output voltages are all V', there is still P I ⁇ P t ⁇ P u .
- the main controller 10 After calculating V', the main controller 10 sends a voltage adjustment command to each sub-controller 1.
- the sub-control module 1 After receiving the voltage adjustment instruction from the main controller 10, the sub-control module 1 sends a control signal to the A/D sampling module 8. After receiving the signal, the A/D sampling module 8 sends a PWM wave to the rectifier power module 5. The PWM wave changes the duty cycle of the IGBT transistor in the rectifier power module to adjust the rectified DC voltage value;
- the A/D conversion module 8 on each power generation circuit will continuously feed back the output voltage of the diesel engine to each sub-controller 1, and the sub-controller 1 then sends the voltage data to the main controller 10 through the bus.
- the sub-control module 1 After the sub-control module 1 receives the voltage compensation signal from the main controller 10, it sends a control signal to the A/D sampling module 8. After receiving the signal, the A/D sampling module 8 sends a PWM wave to the rectifier power module 5. The PWM wave changes the duty cycle of the IGBT transistor in the rectifier power module to adjust the rectified DC voltage value;
- step (g.7) Return to step (g.4) to execute cyclically;
- h-6 first calculated That is to calculate the difference between the average optimal working load power of any diesel engine in the working sequence and any diesel engine in the non-working sequence, where
- the above process is the process of solving the optimal working sequence of the diesel engine, that is, finding the maximum P I value P Imax that satisfies P I ⁇ P t ⁇ P u , and the minimum P u value P umax , so that the lower limit of the total optimal working load power of the diesel engine is found P I and the upper limit P u of the total optimal working load power of the diesel generator set are closest to the total power P t of the DC bus 9.
- the process of optimizing the optimal working sequence of the diesel unit is completed.
- the main controller 10 will periodically detect the total power P t of the DC bus 9. If P t changes, it will return to step ( d) If P t does not change, the optimization ends, and the diesel engine set will keep the current sequence to work.
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- 一种直流组网电力系统中的发电机组,包括与直流母线相连接的至少两个发电机供电机构以及主控制模块,发电机供电机构包括柴油发电机,柴油发电机通过供电线路依次与断路器、整流功率模块、熔断器连接,该供电线路最后与直流母线相连接;断路器与整流功率模块间的导线上设有电流传感器,整流功率模块与熔断器之间的导线上设有直流电压传感器,电流传感器、整流功率模块、直流电压传感器都与A/D采样模块电联接,A/D采样模块与子控制器电联接;所有的子控制器与主控制模块电联接,其功率分配方法,步骤如下:步骤a、首先对每台柴油机进行参数设置:通过所述主控制模块进行各个柴油发电机组的功率参数设置,即分别设置第i(i=1、2…N)台柴油机的最优工作负载功率下限P iI以及最优工作负载功率上限P iu,同时选择第一个柴油发电机组作为默认开启项;步骤b、主控制器不断检测直流组网电力系统的总功率P t,当直流母线中有负载工作时,发电系统也同时开始工作,第一个柴油发电机组开始工作;子控制器计算第一个柴油发电机组的使用功率P 1;第一个柴油发电机组产生的交流电通过所述整流功率模块,设置整流功率模块的整流参数使整流后的电压值保持在V 1min~V 1max内,以保证P 1I<P 1<P 1u;步骤c、主控制器将计算柴油机组总最优工作负载功率的范围,此时只有第一个柴油机组处于工作状态,柴油机组总最优工作负载功率下限P I=P 1I,柴油机组总最优工作负载功率上限P u=P 1u;步骤d、主控制器将依次判定所有柴油机组的工作状态,若第i个柴油机组处于工作状态,子控制器计算第i个柴油发电机组的使用功率P i:第i个柴油机组产生的交流电通过所述整流功率模块,设置整流功率模块的整流参数使整流后的电压值保持在V imin~V imax内,以保证P 1I<P 1<P 1u;步骤e、主控制器将通过下式计算柴油机组总最优工作负载功率的范围:步骤f、主控制器将直流母线的总功率P t与柴油机组总最优负载功率下限P I与柴油机组总最优工作负载功率下限P u进行比较,若P I<P t<P u,说明柴油机组的总发电功率达到P t时,每台柴油机的发电功率都在最优工作负载功率范围之内;此时进行步骤(g);若P t不满足P I<P t<P u,即P t>P u或P t<P I时,则进行步骤(h);步骤g、主控制器根据交叉耦合控制策略通过子控制器进行柴油机电压的同步控制;步骤h、建立优化模型,优化求解柴油机组最优工作序列:h-1、设现有工作发电机序列为W={W 1,W 2,…,W L},非工作发电机序列为S={S 1,S 2,…,S N-L},其中W∪S={1,2,3,…,N};h-3、计算 若P′<P t,则W=W∪{S I},S=S\{S I},L=L+1,即将步骤h-2中找到的平均最优工作负载功率最大的一台柴油机启动,然后回到步骤h-2,直至P′>P t时,继续执行步骤h-6;h-5、计算 若P″>P t,则则W=W\{W I},S=S∪{W I},L=L-1,即将步骤h-4中找到的平均最优工作负载功率最大的一 台柴油机启动,然后回到步h-4,直至P″<P t时,继续执行步骤h-6;然后计算若I=0,则W=W∪{S J},S=S\{S J},L=L+1若J=0,则W=W\{W I},S=S∪{W I},L=L-1若I、J≠0,则W=W∪{S J}\{W I},S=S∪{W I}\{S J},L=L上述过为即求解柴油机最优工作序列的过程,即找到满足P I<P t<P u的最大P I值P Imax,以及最小P u值P umax,使得柴油机组总最优工作负载功率下限P I和柴油机组总最优工作负载功率上限P u与直流母线总功率P t最为接近;I=0,W=W∪{S J},S=S\{S J},L=L+1表示从非工作序列中开启一台柴油机后即可满足P I=P Imax,P u=P umax,无需从工作序列中关闭柴油机;J=0,W=W\{W I},S=S∪{W I},L=L-1表示从工作序列中关闭一台柴油机后即可满足P I=P Imax,P u=P umax,无需从非工作序列中开启柴油机;J≠0,W=W∪{S J}\{W I},S=S∪{W I}\{S J},L=L表示从非工作序列中开启一台柴油机,并且从工作序列中关闭一台柴油机后即可满足P I=P Imax,P u=P umax;h-7完成上述步骤后即完成了柴油机组最优工作序列优化求解的过程,主控制器将周期性的检测直流母线总功率P t,若P t发生变化,则重新回到步骤4,若 P t不发生变化则优化结束,柴油机组将保持现有序列进行工作。
- 如权利要求1所述的直流组网的发电机组功率分配方法,其特征在于:所述步骤g包括以下内容:g-1、当P I<P t<P u时,主控制器根据当前直流组网系统的总功率Pt计算得到一平均电压V′,且当所有工作中的柴油机的输出电压都为V′时,满足P I<P t<P u;g-2、计算得到V′后,主控制器向各路子控制器发出电压调节指令;g-3、子控制器收到来自主控制器的电压调节指令后,控制整流功率模块调节整流的直流电压值;g-4、各发电电路上的A/D转换模块将不断将柴油机的输出电压反馈给各路子控制器,子控制器再通过总线将电压数据发送给主控制器;g-5、主控制器得到各发电电路子控制器发送的电压数据后,将V′与各路输出电压分别作差,主控制器将根据电压差值对各路子控制器发出电压补偿信号;g-6、子控制器收到来自主控制器的电压补偿信号后,再次控制整流功率模块调节整流的直流电压值;g-7、回到步骤g-4循环执行。
- 如权利要求3或4所述的直流组网的发电机组功率分配方法,其特征在于:所述步骤g-3,子控制器收到来自主控制器的电压调节指令后,控制整流功率模块调节整流的直流电压值,具体操作为:子控制器收到来自主控制器的电压调节指令后,对A/D采样模块发送控制信号,A/D采样模块接收信号后向整流功率模块发送PWM波,PWM波改变整流功率模块中IGBT晶体管的占空比以调节整流的直流电压值。
- 如权利要求3或4所述的直流组网的发电机组功率分配方法,其特征在于:所述步骤g-6、子控制器收到来自主控制器的电压补偿信号后,控制整流功率模块再次调节整流的直流电压值,具体操作为:子控制器收到来自主控制器的电压补偿信号后,对A/D采样模块发送控制信号,A/D采样模块接收信号后向整流功率模块发送PWM波,PWM波改变整流功率模块中IGBT晶体管的占空比以调节整流的直流电压值。
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