CN110311387B - Control method, device and equipment for hybrid reactive power compensation device - Google Patents
Control method, device and equipment for hybrid reactive power compensation device Download PDFInfo
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- CN110311387B CN110311387B CN201910727489.5A CN201910727489A CN110311387B CN 110311387 B CN110311387 B CN 110311387B CN 201910727489 A CN201910727489 A CN 201910727489A CN 110311387 B CN110311387 B CN 110311387B
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The application discloses a control method and equipment for a hybrid reactive power compensation device, wherein the method comprises the following steps: uploading the three-phase voltage instantaneous value, the three-phase current instantaneous value and the power grid operating frequency of a load bus of the compensation device to an upper computer of the compensation device; inputting the capacitance value of a capacitor in an upper computer of the compensation device, and designating the input group number of a TSC switching capacitor of the hybrid reactive power compensator and the output reactive power of the SVG according to the set reactive power or power factor to obtain a calculation result; and respectively issuing control instructions to a lower computer of the TSC controller and a lower computer of the SVG controller of the compensation device according to the calculation results. According to the reactive power compensation method and device, the upper computer can be used for realizing accurate compensation of the hybrid reactive power compensation device, and can be used for carrying out optimization calculation under the condition of the power factor range of 0.9-1 allowed by a power grid system according to the output reactive power, so that the optimal accurate compensation reactive value of the reactive power compensation device is obtained.
Description
Technical Field
The application belongs to the technical field of power supply of power systems, and particularly relates to a control method, a control device and control equipment for a hybrid reactive power compensation device.
Background
The inductive load in the power system generally exists, and directly causes the power factor of the system to be lower, thereby increasing the voltage loss of a transmission line and reducing the transmission efficiency of the system. The existing solutions enable the system to operate under the unit power factor, and can be classified into the following three types:
1. passive reactive compensation scheme (TSC): the method utilizes an inductor, a capacitor and a switching switch to form a branch which is connected in parallel under a load voltage bus, the inductor is directly utilized, the capacitor absorbs and sends out reactive power to compensate the reactive underload of the load, the compensation capacity is large, the voltage resistance is high, the reliability is high, and the reactive output can be dynamically adjusted; however, the dynamic regulation speed is slow, and only gear switching can be performed, so that reactive output cannot be accurately regulated, and finally, full compensation cannot be realized.
2. Active reactive compensation Scheme (SVG): the method is characterized in that a load voltage bus is connected with a power electronic converter in parallel, the system can operate under a unit power factor by tracking and controlling the reactive component of the load current at the network side, and the dynamic regulation speed is high; however, the control circuit is complex, the reliability is low, and the capacity, voltage resistance and current tolerance levels are limited by the switching devices, although the converter and the voltage bus side can be matched with appropriate inductance and capacitance to reduce the voltage and capacity levels of the converter device, the current tolerance capability of the whole device is still limited.
3. Hybrid reactive compensation scheme (TSC + SVG): the method is characterized in that a passive reactive power compensation device and an active reactive power compensation device are connected in parallel on a load bus, main reactive power deficit compensation is realized by the passive device, and fine reactive power deficit compensation is realized by the active device, so that the whole system operates under the condition of a unit power factor.
However, with the continuous development of power systems, the reactive compensation equipment is not required to be simply full compensation, i.e., the system works under unit power, but the reactive compensation equipment is required to be capable of accurately compensating and making reactive power or making the system work under the condition of specified power factors, for example, on a specified reactive test platform capable of adjusting reactive power shortage, certain overvoltage adjustment is performed by using the power factor range of 0.9-1 allowed by a power grid so as to achieve better economic performance, limited compensation equipment capacity or low full compensation economy, and the like; in addition, the capacitance switching device is responsible for high-power compensation and has slow response time.
The prior art therefore has two drawbacks: (1) The method mainly aims at full compensation, and cannot compensate accurately or only can fully compensate the system; (2) The reactive power is greatly increased, the static var generator compensates the reactive power before the capacitance switching device does not reach the steady state, and the static var generator can put in the whole capacity and easily generate overcurrent.
Disclosure of Invention
In view of this, according to the control method, the control device, and the control apparatus for the hybrid reactive power compensation apparatus provided by the present application, the upper computer is used to implement the accurate compensation of the hybrid reactive power compensation apparatus, and the upper computer is capable of performing an optimization calculation by adding the power factor range condition of 0.9-1 allowed by the power grid system to the output reactive power or the system operation power factor, so as to obtain the optimal accurate compensation reactive power value of the reactive power compensation apparatus or the system optimal power factor operation value. And determining the number of the input capacitor groups according to the obtained total reactive power required to be compensated by the hybrid compensation equipment, obtaining the reactive power required to be compensated by the static reactive generator according to the known capacity of the capacitor, and performing reactive compensation on the power grid.
A first aspect of the present application provides a control method for a hybrid reactive compensation device, the method comprising the steps of:
acquiring three-phase voltage instantaneous values, three-phase current instantaneous values and power grid operating frequency of a load bus of a compensation device;
acquiring a capacitance value of a switching capacitor, and acquiring a calculation result of reactive power of a corresponding mode according to a specified power compensation mode or a specified power factor compensation mode;
and respectively issuing control instructions to a lower computer of the TSC controller and a lower computer of the SVG controller of the compensation device according to the calculation results.
Preferably, the compensation device comprises an upper computer, a lower computer of the TSC controller, a lower computer of the SVG controller, the TSC controller, the SVG controller and a load bus; the upper computer is respectively in communication connection with a lower computer of the TSC controller and a lower computer of the SVG controller; the lower computer of the TSC controller and the TSC controller are both connected with the load bus; the lower computer of the SVG controller with the SVG controller all with the load bus is connected.
Preferably, the first and second electrodes are formed of a metal,
the method comprises the following steps of obtaining the capacitance value of a switching capacitor, and obtaining the reactive power calculation result of a corresponding mode according to a specified power compensation mode or a specified power factor compensation mode:
acquiring the capacitance value of the switched capacitor, integrating the specified reactive power, calculating the number of the specified TSC switched capacitors and the output reactive power of the SVG through an optimized configuration formula, and acquiring a calculation result; the optimal configuration formula operating in the specified reactive power compensation mode specifically comprises:
wherein U is the effective value of the single-phase voltage of the load bus; omega is the running frequency of the power grid; c is the capacitance value of the switching capacitor; q is the designated compensation reactive power; n is * Switching the number of capacitors for a specified TSC; q * Is the reactive power output quantity.
Preferably, the obtaining of the capacitance value of the switching capacitor and the obtaining of the calculation result of the reactive power in the corresponding mode according to the designated power compensation mode or the designated power factor compensation mode includes:
acquiring a capacitance value of a switching capacitor, integrating the running power of a specified system, and acquiring a calculation result in a specified power factor mode through an optimized configuration formula; the optimal configuration formula specifically comprises:
where λ is a specified power factor.
Preferably, the respectively issuing of the control instruction to the lower computer of the TSC controller and the lower computer of the SVG controller of the compensation device according to the calculation result includes:
issuing a control instruction to a lower computer of a TSC (thyristor switched capacitor) controller of the compensation device according to the calculation result, so that the lower computer controls the number of the phase-switching-on switches according to the control instruction;
and issuing a control instruction to a lower computer of an SVG controller of the compensation device according to the calculation result, so that the lower computer increases power outer loop control according to the control instruction.
A second aspect of the present application provides a control device for a hybrid reactive compensation device,
the system comprises an upper computer, a lower computer of a TSC controller, a lower computer of an SVG controller, a TSC controller, an SVG controller and a load bus;
the upper computer acquires three-phase voltage instantaneous values, three-phase current instantaneous values and power grid operating frequency of the load bus;
inputting the capacitance value of a switching capacitor in an upper computer, selecting a system to operate in a specified power compensation mode or a specified power factor compensation mode according to a set system operation mode, and obtaining a calculation result of reactive power of the corresponding mode;
and respectively issuing control instructions to a lower computer of the TSC controller and a lower computer of the SVG controller according to the calculation results so that the lower computer of the TSC controller controls the TSC controller according to the control instructions and the lower computer of the SVG controller controls the SVG controller according to the control instructions.
Preferably, the upper computer is respectively in communication connection with a lower computer of the TSC controller and a lower computer of the SVG controller; the lower computer of the TSC controller and the TSC controller are both connected with the load bus; the lower computer of the SVG controller with the SVG controller all with the load bus is connected.
Preferably, the step of inputting the capacitance value of the switching capacitor in the upper computer, selecting the system to operate in a designated power compensation mode or a designated power factor compensation mode according to a set system operation mode, and obtaining the calculation result of the reactive power of the corresponding mode includes:
inputting the capacitance value of a capacitor in an upper computer of the compensation device, integrating the running power of a specified system, and carrying out the operation of the specified system in a specified power factor mode through an optimized configuration formula to obtain a calculation result; the optimal configuration formula specifically comprises:
wherein, U is the effective value of the single-phase voltage of the load bus; omega is the running frequency of the power grid; c is the capacitance value of the switching capacitor; q is the designated compensation reactive power; n is a radical of an alkyl radical * Switching the number of capacitors for a specified TSC; q * Is the reactive power output.
A third aspect of the present application provides a control apparatus for a hybrid reactive compensation device, comprising a processor and a memory, the memory having stored thereon computer program instructions, which when executed by the processor, implement a control method for a hybrid reactive compensation device according to the first aspect.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for executing the control method for the hybrid reactive compensation apparatus of the first aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a control method for a hybrid reactive power compensation device, which comprises the following steps: acquiring three-phase voltage instantaneous values, three-phase current instantaneous values and power grid operating frequency of a load bus of a compensation device; acquiring a capacitance value of a switching capacitor, and acquiring a calculation result of reactive power of a corresponding mode according to a specified power compensation mode or a specified power factor compensation mode; and respectively issuing control instructions to a lower computer of the TSC controller of the compensation device and a lower computer of the SVG controller according to the calculation results.
According to the control method for the hybrid reactive power compensation device, the upper computer is used for realizing accurate compensation of the hybrid reactive power compensation equipment, and the upper computer can perform optimization calculation according to the output reactive power and the power factor range condition of 0.9-1 allowed by a power grid system, so that the optimal accurate compensation reactive power value of the reactive power compensation equipment is obtained. And determining the number of the input capacitor groups according to the obtained total reactive power required to be compensated by the hybrid compensation equipment, obtaining the reactive power required to be compensated by the static reactive generator according to the known capacity of the capacitor, and performing reactive compensation on the power grid.
Drawings
Fig. 1 is a schematic flowchart of a control method for a hybrid reactive power compensation device according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of a hybrid reactive power compensation device according to a first embodiment of the present application;
fig. 3 is a schematic input interface diagram of an upper computer for a hybrid reactive power compensation device in a first embodiment of the present application.
Detailed Description
According to the control method, device and equipment for the hybrid reactive power compensation device, the upper computer is used for realizing accurate compensation of the hybrid reactive power compensation device, and the upper computer can perform optimization calculation by adding a power factor range condition of 0.9-1 allowed by a power grid system to the output reactive power or the system operation power factor, so that the optimal accurate compensation reactive power value of the reactive power compensation device or the system optimal power factor operation value is obtained. And determining the number of the input capacitor banks according to the obtained total reactive power required to be compensated by the hybrid compensation equipment, obtaining the reactive power required to be compensated by the static reactive power generator according to the known capacity of the capacitor, and performing reactive power compensation on the power grid.
Hybrid compensation: the reactive power compensation equipment of the power system comprises two devices of power type active reactive power compensation and switch switching type inductance and capacitance combined passive reactive power compensation.
Reactive power accurate compensation: the reactive compensation equipment can emit any given specified amount of reactive power.
In order to make those skilled in the art better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 to 3, fig. 1 is a schematic flow chart of a control method for a hybrid reactive power compensation device according to a first embodiment of the present application; fig. 2 is a schematic structural diagram of a hybrid reactive power compensation device according to a first embodiment of the present application; fig. 3 is a schematic input interface diagram of an upper computer for a hybrid reactive power compensation device in a first embodiment of the present application.
A first aspect of the present application provides a control method for a hybrid reactive power compensation apparatus, the method comprising the steps of:
10, acquiring instantaneous values of three-phase power grid voltage and power grid current of a load bus, load active power and power grid operating frequency;
20, acquiring the capacitance value of the switched capacitor, and acquiring the calculation result of the reactive power of the corresponding mode according to the specified power compensation mode or the specified power factor compensation mode;
and 30, respectively issuing control instructions to a lower computer of the TSC controller and a lower computer of the SVG controller of the compensation device according to the calculation results.
It should be noted that, according to the control method for the hybrid reactive power compensation device provided in the embodiment of the present application, the method steps are mainly implemented by the hybrid reactive power compensation device, and on the basis of the existing hybrid compensation device, an upper computer is added, and two compensation modes, namely, a specified reactive power and a specified power factor, are selected by the upper computer, so that the number of the passive capacitors and the reactive output quantity of the active compensation device are determined by an optimization algorithm, and the compensation device can accurately obtain the reactive compensation quantity set by the upper computer. And determining the number of capacitor groups required to be input by the capacitor switching device according to the instruction value of the reactive compensation quantity to obtain the reactive power required to be input by the static reactive generator. The specific implementation steps are as follows: sampling the load bus voltage and the TSC output current by a lower computer of the TSC controller to obtain a load bus three-phase voltage instantaneous value and a TSC output three-phase instantaneous current; the lower computer of the SVG controller samples the voltage of the load bus and the output current of the SVG to obtain the instantaneous value of the three-phase voltage of the load bus and the instantaneous value of the output three-phase current of the SVG, and simultaneously, the lower computer of the SVG controller collects the load current to obtain the active power P consumed by the load. The lower computer of the TSC controller and the lower computer of the SVG controller respectively upload the instantaneous values of three-phase voltage and three-phase current of a load bus, the active power P and reactive power Q consumed by a load and the running frequency omega of a power grid to a main monitoring upper computer through optical fiber communication, the capacitance value C of each group of capacitors and the specified reactive power required to be output by the whole set of hybrid reactive power compensation equipment are input into the main monitoring upper computer, and the interface of the system main monitoring upper computer needs to contain the electric quantity required to be input as shown in figure 3. And then, calculating an optimal configuration formula 1 (appointed output reactive power) or an optimal configuration formula 2 (appointed power factor) in the main monitoring upper computer, and respectively issuing a calculation result as an instruction control signal to the controller lower computer 1 of the TSC and the controller lower computer 2 of the SVG through optical fiber communication. Compared with the traditional hybrid reactive power compensation equipment, the method can enable the hybrid reactive power compensation equipment to be controlled by an upper main monitoring upper computer to realize accurate compensation, and various optimization control examples can be carried out by using a reactive power compensation value output by an upper control center and adding a power factor range condition of 0.9-1 allowed by a power grid system, so that the power distribution of the system is more economic and reasonable. The reactive power instruction value of the static var generator when the whole device reaches a steady state is obtained through pre-judgment in advance, the phenomenon that the capacitor switching device works in a maximum reactive power compensation state due to slow response before static var generation is prevented, and the over-current condition of the device is reduced.
Or alternatively it is that,
sampling the load bus voltage and the TSC output current by a lower computer of the TSC controller to obtain the instantaneous value of the load bus three-phase voltage and the instantaneous value of the TSC output three-phase current; the lower computer of the SVG controller samples the voltage of the load bus and the output current of the SVG to obtain the instantaneous value of the three-phase voltage of the load bus and the instantaneous value of the three-phase current output by the SVG, and simultaneously, the lower computer of the SVG controller collects the load current to obtain the active power P consumed by the load. The lower computer of the TSC controller and the lower computer of the SVG controller respectively upload the load bus three-phase voltage instantaneous value, the active power P and the reactive power consumed by the load and the power grid operating frequency omega to the main monitoring upper computer through optical fiber communication, the capacitance value C of each group of capacitors and the specified reactive power required to be output by the whole set of hybrid reactive power compensation equipment are input into the main monitoring upper computer, and the interface of the system main monitoring upper computer needs to contain the electric quantity to be input as shown in figure 3. And then, calculating an optimized configuration formula 2 (specifying a system operation power factor) in the main monitoring upper computer, and taking a calculation result as an instruction control signal to respectively issue the controller lower computer 1 of the TSC and the controller lower computer 2 of the SVG through optical fiber communication. Compared with the traditional hybrid reactive compensation equipment, the method can ensure that the hybrid reactive compensation equipment is regulated and controlled by an upper main monitoring upper computer to realize accurate compensation, and various optimization regulation and control examples can be carried out by utilizing the reactive power compensation value output by an upper regulation and control center and adding the power factor range condition of 0.9-1 allowed by a power grid system, thereby ensuring that the power distribution of the system is more economic and reasonable. The reactive power instruction value of the static var generator when the whole device reaches a steady state is obtained through advanced prejudgment, the phenomenon that the static var generator works in a maximum reactive power compensation state due to slow response of a capacitor switching device before the static var generator occurs is prevented, and the over-current condition of the device is reduced.
Furthermore, the compensation device comprises an upper computer, a lower computer of the TSC controller, a lower computer of the SVG controller, the TSC controller, the SVG controller and a load bus; the upper computer is respectively in communication connection with the lower computer of the TSC controller and the lower computer of the SVG controller; the lower computer of the TSC controller and the TSC controller are both connected with a load bus; and the lower computer of the SVG controller and the SVG controller are both connected with a load bus.
It should be noted that, as shown in fig. 2, a control method for a hybrid reactive power compensation device in an embodiment of the present application is implemented mainly by using the hybrid reactive power compensation device, where the structure of the hybrid reactive power compensation device includes: the system comprises an upper computer, a lower computer of the TSC controller, a lower computer of the SVG controller, the TSC controller, the SVG controller and a load bus. The upper computer is respectively connected with a lower computer of the TSC controller and a lower computer of the SVG controller through optical fibers, the lower computer of the TSC controller and the lower computer of the SVG controller are both connected with a load bus, the lower computer of the TSC controller is connected with and controls the TSC controller, and the lower computer of the SVG controller is connected with and controls the SVG controller. In the figure, the TSC represents a passive capacitor switching reactive power compensation device, and the number of each phase switching-on switch, namely the number of capacitors for putting into reactive power compensation, is controlled by a lower computer of the TSC controller; SVG stands for active power electronic reactive power compensation device, adds the reactive outer ring in the lower computer of SVG controller (the embodiment of this application regards the reactive power that SVG sent as the supplement after the action to TSC reactive generator. And the upper computer respectively issues the lower computer of the TSC controller and the lower computer of the SVG controller through optical fiber communication by taking the calculation result as an instruction control signal through the calculation of an optimized configuration formula 1 (appointed output reactive power). And the lower computer of the TSC controller and the lower computer of the SVG controller can obtain the TSC compensation reactive power according to the received control signals, and perform reactive compensation on the power grid and power outer loop control needing SVG addition. Particularly, the upper computer can be regarded as a main control ARM board, and mainly has the function of controlling a lower computer of the TSC controller and a lower computer of the SVG controller to work, wherein the lower computer of the TSC controller refers to a hardware control system for controlling the TSC, and the lower computer of the SVG controller refers to a hardware control system for controlling the SVG.
Or the upper computer respectively issues the lower computer of the TSC controller and the lower computer of the SVG controller through optical fiber communication by taking the calculation result as an instruction control signal through calculation of an optimized configuration formula 2 (specifying a system operation power factor). And the lower computer of the TSC controller and the lower computer of the SVG controller can obtain the TSC compensation reactive power according to the received control signals, and perform reactive power compensation and power outer loop control needing SVG addition on the power grid.
Further, acquiring a capacitance value of the switching capacitor, and acquiring a calculation result of reactive power of a corresponding mode according to a specified power compensation mode or a specified power factor compensation mode;
acquiring a capacitance value of a switching capacitor, integrating specified reactive power, and calculating specified output reactive power through an optimized configuration formula to acquire a calculation result; the optimal configuration formula specifically comprises:
wherein U is the effective value of the single-phase voltage of the load bus; omega is the running frequency of the power grid; c is the capacitance value of the switching capacitor; q is the designated compensation reactive power; n is * Switching the number of capacitors for a specified TSC; q * Is the reactive power output.
It should be noted that the load bus three-phase voltage instantaneous value, the load side three-phase current instantaneous value and the bus three-phase grid current instantaneous value are uploaded to the upper computer through optical fiber communication respectively through the lower computer of the TSC controller and the lower computer of the SVG controller, the capacitance value C of each group of capacitors and the specified reactive power required to be output by the whole set of hybrid reactive power compensation equipment are input into the upper computer, the calculation result is obtained through calculation of an optimal configuration formula 1 (specified reactive power) in the upper computer, and the calculation result is used as a control signal to respectively send the lower computer of the TSC controller and the lower computer of the SVG controller through optical fiber communication.
Further, obtaining the capacitance value of the switching capacitor, and obtaining the calculation result of the reactive power in the corresponding mode according to the specified power compensation mode or the specified power factor compensation mode includes:
acquiring a capacitance value of a switching capacitor, integrating the running power of a specified system, and acquiring a calculation result in a specified power factor mode through an optimized configuration formula; the optimal configuration formula specifically comprises:
where λ is a specified power factor.
It should be noted that, the load bus three-phase voltage instantaneous value, the active power P and the reactive power Q consumed by the load bus, and the grid operating frequency are uploaded to the upper computer through optical fiber communication respectively by the lower computer of the TSC controller and the lower computer of the SVG controller, the capacitance value C of each group of capacitors and the designated reactive power required to be output by the whole set of hybrid reactive compensation equipment are input into the upper computer, a calculation result is obtained through calculation of an optimized configuration formula 2 (designated system operating power factor) in the upper computer, and the calculation result is used as a control signal to be respectively issued to the lower computer of the TSC controller and the lower computer of the SVG controller through optical fiber communication.
Further, respectively issuing a control instruction to a lower computer of the TSC controller and a lower computer of the SVG controller of the compensation device according to the calculation result includes:
sending a control instruction to a lower computer of the TSC controller of the compensation device according to the calculation result, so that the lower computer controls the number of the phase switching switches according to the control instruction;
and sending a control instruction to a lower computer of the SVG controller of the compensation device according to the calculation result, so that the lower computer increases power outer loop control according to the control instruction.
After the lower computer of the TSC controller and the lower computer of the SVG controller receive the control instruction, the lower computer of the TSC controller controls the number of the phase switching switches according to the calculation result in the received instruction, determines the number of capacitor groups to be input by the capacitor switching device, and obtains the reactive power to be input by the static var generator. And the lower computer of the SVG controller controls the power outer loop control and supplements the TSC reactive generator after the action.
A second aspect of the present application provides a control device for a hybrid reactive compensation device,
the system comprises an upper computer, a lower computer of a TSC controller, a lower computer of an SVG controller, the TSC controller, the SVG controller and a load bus;
the upper computer acquires three-phase voltage instantaneous values, three-phase current instantaneous values and power grid operating frequency of the load bus;
the capacitance value of a switching capacitor is input into the upper computer, the system is selected to operate in a specified power compensation mode or a specified power factor compensation mode according to a set system operation mode, and a calculation result of reactive power of the corresponding mode is obtained;
and respectively issuing control instructions to a lower computer of the TSC controller and a lower computer of the SVG controller according to the calculation results so that the lower computer of the TSC controller controls the TSC controller according to the control instructions and the lower computer of the SVG controller controls the SVG controller according to the control instructions.
Preferably, the upper computer is in communication connection with a lower computer of the TSC controller and a lower computer of the SVG controller respectively; the lower computer of the TSC controller and the TSC controller are both connected with a load bus; and the lower computer of the SVG controller and the SVG controller are both connected with a load bus.
Preferably, the method includes the steps of inputting a capacitance value of a switching capacitor in the upper computer, selecting a system to operate in a designated power compensation mode or a designated power factor compensation mode according to a set system operation mode, and obtaining a calculation result of reactive power of the corresponding mode, wherein the calculation result includes:
inputting the capacitance value of a capacitor in an upper computer of the compensation device, integrating the running power of the specified system, and carrying out the operation of the specified system in a specified output reactive power mode through an optimized configuration formula to obtain a calculation result; the optimal configuration formula specifically comprises:
wherein U is the effective value of the single-phase voltage of the load bus; omega is the running frequency of the power grid; c is the capacitance value of the switching capacitor; q is the designated compensation reactive power; n is a radical of an alkyl radical * Switching the number of capacitors for the specified TSC; q * Is the reactive power output.
The present application further provides a control apparatus for a hybrid reactive power compensation device, comprising a processor and a memory, the memory having stored thereon computer program instructions, which when executed by the processor, implement a control method for a hybrid reactive power compensation device of the first embodiment.
The present application also provides a computer-readable storage medium for storing program code for executing the control method for the hybrid reactive compensation apparatus of the first embodiment.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (7)
1. A control method for a hybrid reactive power compensation device, comprising:
acquiring three-phase voltage instantaneous values, three-phase current instantaneous values and power grid operating frequency of a load bus of a compensation device;
inputting the capacitance value of a switching capacitor in the upper computer, and obtaining a calculation result of reactive power of a corresponding mode according to a specified power compensation mode and a specified power factor compensation mode; specifically, the method comprises the following steps:
the method comprises the steps that the capacitance value of a switching capacitor is input into an upper computer, under a specified power compensation mode, specified reactive power is integrated, the number of the specified TSC switching capacitors and SVG output reactive power are calculated through an optimized configuration formula, and a calculation result is obtained; wherein, the optimal configuration formula operating under the condition of the specified reactive power compensation mode specifically comprises:
acquiring the capacitance value of a switching capacitor, integrating the running power of a specified system in a specified power factor compensation mode, calculating the number of the specified TSC switching capacitors and the output reactive power of the SVG through an optimized configuration formula, and acquiring a calculation result; wherein, the optimal configuration formula operating in the specified power factor compensation mode specifically comprises:
wherein, λ is a designated power factor, and U is a single-phase voltage effective value of the load bus; omega is the running frequency of the power grid; c is the capacitance value of the switching capacitor; n is * Switching the number of capacitors for a specified TSC; q * Is the reactive power output quantity; q is the designated compensation reactive power; p is the active power consumed by the load bus;
and respectively issuing control instructions to a lower computer of the TSC controller of the compensation device and a lower computer of the SVG controller according to the calculation results so that the lower computer of the TSC controller controls the TSC controller according to the control instructions and the lower computer of the SVG controller controls the SVG controller according to the control instructions.
2. The control method for the hybrid reactive power compensation device according to claim 1, wherein the compensation device includes an upper computer, a lower computer of a TSC controller, a lower computer of an SVG controller, a TSC controller, an SVG controller, and a load bus; the upper computer is in communication connection with the lower computer of the TSC controller and the lower computer of the SVG controller respectively; the lower computer of the TSC controller and the TSC controller are both connected with the load bus; and the lower computer of the SVG controller and the SVG controller are connected with the load bus.
3. The control method for the hybrid reactive power compensation device according to claim 1, wherein the issuing of the control command to the lower computer of the TSC controller and the lower computer of the SVG controller of the compensation device, respectively, according to the calculation result includes:
issuing a control instruction to a lower computer of a TSC (thyristor switched capacitor) controller of the compensation device according to the calculation result, so that the lower computer controls the number of the phase-switching-on switches according to the control instruction;
and issuing a control instruction to a lower computer of the SVG controller of the compensation device according to the calculation result, so that the lower computer increases power outer loop control according to the control instruction.
4. A control device for a hybrid reactive power compensation device is characterized by comprising an upper computer, a lower computer of a TSC controller, a lower computer of an SVG controller, a TSC controller, an SVG controller and a load bus;
the upper computer acquires three-phase voltage instantaneous values, three-phase current instantaneous values and power grid operating frequency of the load bus;
the method comprises the steps that the capacitance value of a switching capacitor is input into an upper computer, the system is selected to operate in a specified power compensation mode and a specified power factor compensation mode according to a set system operation mode, and the calculation result of the reactive power of the corresponding mode is obtained; specifically, the method comprises the following steps:
the method comprises the steps that the capacitance value of a switching capacitor is input into an upper computer, under a specified power compensation mode, specified reactive power is integrated, the number of the specified TSC switching capacitors and SVG output reactive power are calculated through an optimized configuration formula, and a calculation result is obtained; wherein, the optimal configuration formula operating under the condition of the specified reactive power compensation mode specifically comprises:
the method comprises the steps that the capacitance value of a switching capacitor is input into an upper computer, under a specified power factor compensation mode, the running power of a specified system is integrated, the number of the specified TSC switching capacitors and the SVG output reactive power are calculated through an optimized configuration formula, and a calculation result is obtained; wherein, the optimal configuration formula operating in the specified power factor compensation mode specifically comprises:
wherein, λ is a designated power factor, and U is a single-phase voltage effective value of the load bus; omega is the running frequency of the power grid; c is the capacitance value of the switching capacitor; n is * Switching the number of capacitors for the specified TSC; q * Is the reactive power output quantity; q is the designated compensation reactive power; p is the active power consumed by the load bus;
and respectively issuing control instructions to a lower computer of the TSC controller and a lower computer of the SVG controller according to the calculation results so that the lower computer of the TSC controller controls the TSC controller according to the control instructions and the lower computer of the SVG controller controls the SVG controller according to the control instructions.
5. The control device for the hybrid reactive power compensation device according to claim 4, wherein the upper computer is in communication connection with a lower computer of the TSC controller and a lower computer of the SVG controller respectively; the lower computer of the TSC controller and the TSC controller are both connected with the load bus; and the lower computer of the SVG controller and the SVG controller are connected with the load bus.
6. A control apparatus for a hybrid reactive power compensation device, comprising a processor and a memory having stored thereon computer program instructions which, when executed by the processor, implement a control method for a hybrid reactive power compensation device as claimed in any one of claims 1 to 3.
7. A computer-readable storage medium for storing program code for performing a control method for a hybrid reactive compensation device according to any of claims 1-3.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741093A (en) * | 2010-03-11 | 2010-06-16 | 哈尔滨工业大学 | Reactive power compensation and harmonic governance system and control method for realizing power compensation and harmonic governance by using the same |
| CN203933025U (en) * | 2014-04-01 | 2014-11-05 | 江苏博力电气科技有限公司 | A kind of novel hybrid reactive power compensation device |
| CN207910477U (en) * | 2017-12-30 | 2018-09-25 | 安徽佑赛科技股份有限公司 | A kind of TSC and SVG mixing reactive compensation control systems |
-
2019
- 2019-08-07 CN CN201910727489.5A patent/CN110311387B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741093A (en) * | 2010-03-11 | 2010-06-16 | 哈尔滨工业大学 | Reactive power compensation and harmonic governance system and control method for realizing power compensation and harmonic governance by using the same |
| CN203933025U (en) * | 2014-04-01 | 2014-11-05 | 江苏博力电气科技有限公司 | A kind of novel hybrid reactive power compensation device |
| CN207910477U (en) * | 2017-12-30 | 2018-09-25 | 安徽佑赛科技股份有限公司 | A kind of TSC and SVG mixing reactive compensation control systems |
Non-Patent Citations (1)
| Title |
|---|
| 混合型无功补偿装置的研究;廖兵;《中国优秀硕士学位论文全文数据库》;20190115(第1期);全文 * |
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