CN207530610U - A kind of reactor coolant pump supplies electric installation - Google Patents

Abstract

The utility model provides a kind of reactor coolant pump for electric installation, which includes：Ultracapacitor group, two-way DC/DC converters, monitoring and controlling module, two-way inverter, transformer；Two-way DC/DC converters by direct current boosted or decompression processing after export；AC conversion is direct current electricity output or is exchange electricity output by DC conversion by two-way inverter；Transformer and reactor coolant pump are electrically connected, and be to meet first to set the exchange electricity output of voltage value to reactor coolant pump by AC conversion；Monitoring and controlling module is electrically connected with two-way DC/DC converters, acquire the voltage of two-way inverter direct-flow side, the first end of two-way DC/DC converters voltage and current, and control that the voltage of two-way DC/DC converters output direct current meets the second setting voltage value and/or electric current meets setting electric current value.The utility model can in the case of reactor coolant pump powers off emergency service, improve the reactor coolant pump rotor coasting time, it is ensured that system safety.

Description

A kind of reactor coolant pump supplies electric installation

Technical field

The utility model is related to Nuclear Power Plant electricity system power technique fields more particularly to a kind of reactor coolant pumps For electric installation.

Background technology

Reactor coolant pump (referred to as " main pump ") is one of key equipment of pressurized-water reactor nuclear power plant primary Ioops system, every Loop has a main pump, for driving cooling agent in reactor coolant loop internal circulation flow, continuously in reactor core The heat transfer of generation feeds water to steam generator secondary side.The coolant flow that main pump ensures to have appropriate flow is through reactor core, with dimension Departure from nucleate boiling ratio (hereinafter referred to as DNBR) is held more than permissible value.

Under nuclear power plant's reactor shutdown condition, main pump running down is limited to the main pump coasting time in order to avoid DNBR occurs System requirement.

When station blackout accident occurs for nuclear power station, running down occurs since main pump loses power supply, passes through the cooling of reactor core Agent flux is reduced suddenly, is threatened to the safety belt of reactor.In order to ensure the safety of reactor core under station blackout operating mode, main pump will It asks with the longer coasting time.

In the case where main pump power-off occurs, reactor needs emergency shut-down.After shutdown reactor dump power exponentially under Drop, therefore higher coolant flow must be maintained in the short time and passes through reactor core.Main pump is equipped with flywheel gear, is consolidated with key Motor shaft end is scheduled on, rotor flywheel can increase the rotary inertia of rotor, and the coasting time of Extending Rotor reaches and avoids occurring DNBR improves security of system.By increasing running down flywheel in main pump rotor, the rotary inertia of main pump rotor is improved, to improve The coasting time of main pump.However the main pump coasting time that current flywheel scheme can maintain is shorter, works as reactor coolant loop When having requirements at the higher level to the main pump coasting time, current flywheel energy storage can not then meet system safety requirements, it is therefore desirable to adopt With a kind of novel emergency service mode, the main pump rotor coasting time is further improved, it is ensured that system safety.

1) in the designing scheme of current main pump, the flywheel energy storage band main pump rotor coasting time can not meet reactor cooling Agent system requirements, conventional method are：Increase weight, the rotary inertia of flywheel, therefore to the metal of main pump motor axis and bearing Material, shear stress, structure etc. propose requirements at the higher level, and otherwise there are the risks of shaft break of motor.

2) flywheel energy storage has threatened the peace of main pump or even nuclear power to a certain extent there are danger such as the too fast, reversions of rotating speed Row for the national games, traditional counter-measure are to increase the system protection devices such as relevant anti-hypervelocity and anti-reverse so that system designs more Add complexity.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of reactor coolant pump for electric installation, it can be anti- In the case of answering reactor coolant pump power-off, emergency service improves the reactor coolant pump rotor coasting time, it is ensured that system is pacified Entirely.

A kind of reactor coolant pump provided by the utility model supplies electric installation, including：Ultracapacitor group, two-way DC/ DC converters, monitoring and controlling module, two-way inverter, transformer；

The two-way DC/DC converters, first end and the ultracapacitor group are electrically connected, second end with it is described double It is electrically connected to the DC side of inverter, for receiving direct current, and the direct current of reception is boosted or decompression is handled After export；

The two-way inverter, exchange side are electrically connected by second switch and the transformer, are also opened by third It closes and is electrically connected with AC power, for receiving the alternating current of the AC power output, and be direct current by AC conversion Output receives direct current, and is exchange electricity output by DC conversion；

The transformer is electrically connected with reactor coolant pump, for receiving alternating current, and the alternating current of reception is turned The alternating current for meeting the first setting voltage value is turned to, and the exchange electricity output of the first setting voltage value will be met to the reactor Coolant pump；

The monitoring and controlling module is electrically connected with the two-way DC/DC converters, for acquiring the two-way inverter The voltage of DC side, the two-way DC/DC converters first end voltage and current, and according to the two-way inverter direct current The voltage of side, the two-way DC/DC converters first end voltage and current, the control two-way DC/DC converters output The voltage of direct current meets the second setting voltage value and/or the electric current satisfaction of the two-way DC/DC converters output direct current is set Constant current value；

The ultracapacitor group, charges for receiving direct current, and when it detects the reactor coolant Start to discharge after pump dead electricity.

Preferably, the ultracapacitor group includes at least two ultracapacitor branches in parallel, each super capacitor Device branch includes the ultracapacitor of at least two series connection.

Preferably, the ultracapacitor group is connect by dc bus with the two-way DC/DC converters, and described super First switch, filter inductance and the are additionally provided on dc bus between grade capacitor group and the two-way DC/DC converters One filter capacitor.

Preferably, the test load for carrying out discharge test to the ultracapacitor group is further included, the experiment is negative Load is made of resistance and inductance, and the ultracapacitor group is electrically connected by the 4th switch with the test load.

Preferably, the second end of the two-way DC/DC converters is connect by dc bus with the two-way inverter, and The second end of the two-way DC/DC converters is also parallel with the second filter capacitor.

Preferably, the two-way DC/DC converters include：First inversion rectification unit, two-winding transformer and second are inverse Become rectification unit；

The first inversion rectification unit, connect with the first end of the two-winding transformer, for receiving from described The direct current of ultracapacitor group, and direct current is converted into exchange electricity output to the two-winding transformer or receives Direct current electricity output is converted to the ultracapacitor group from the alternating current of the two-winding transformer, and by alternating current；

The second inversion rectification unit, connect with the second end of the two-winding transformer, for receiving from described The alternating current of two-winding transformer, and alternating current is converted into direct current electricity output to the two-way inverter or reception and is come from Direct current is converted to exchange electricity output to the two-winding transformer by the direct current of the two-way inverter.

Preferably, the first inversion rectification unit and the second inversion rectification unit are single-phase bridge rectification electricity Road, the bridge arm of the single phase bridge type rectifier circu is two IGBT being connected in series with pipes.

Preferably, the monitoring and controlling module includes：Direct current bus voltage detecting circuit, super-capacitor voltage detection electricity Road, current detection circuit and DC/DC controllers, wherein, the DC/DC controllers include A/D converter, dsp controller and FPGA unit；

The direct current bus voltage detecting circuit, both ends respectively with the DC side of the two-way inverter and the A/D Converter connects, for acquiring the DC bus-bar voltage analog signal of the two-way inverter direct-flow side, and the direct current is female Line voltage analog signal output is to the A/D converter；

The super-capacitor voltage detection circuit, both ends respectively with the first end of the two-way DC/DC converters and institute The connection of A/D converters is stated, for acquiring the super-capacitor voltage analog signal of two-way DC/DC converters first end, and by described in Super-capacitor voltage analog signal output is to the A/D converter；

The current detection circuit, both ends are converted respectively with the first end of the two-way DC/DC converters and the A/D Device connects, for acquiring the inductive current analog signal of the first end of the two-way DC/DC converters, and by the inductive current Analog signal output is to the A/D converter；

The A/D converter is connect with the dsp controller, for by the super-capacitor voltage analog signal, direct current Busbar voltage analog signal and the inductive current analog signal are converted into corresponding super-capacitor voltage digital signal, direct current Busbar voltage digital signal and inductive current digital signal, and the super-capacitor voltage digital signal, the direct current is female Line voltage digital signal and the inductive current digital signal are exported to the dsp controller；

The dsp controller is connect with the FPGA unit, for according to the super-capacitor voltage digital signal, institute It states DC bus-bar voltage digital signal and the inductive current digital signal obtains corresponding super-capacitor voltage value, direct current mother Line voltage value and inductor current value, when the super-capacitor voltage value is unsatisfactory for the second setting voltage value, structure electricity The closed loop controlling structure of inducing current inner ring and DC bus-bar voltage outer shroud, and pass through closed loop controlling structure output control instruction extremely The FPGA unit；

The FPGA unit is connect with the two-way DC/DC converters, for according to the control instruction, generation to correspond to PWM delivery outlet signal, and the PWM delivery outlet signal is exported to the two-way DC/DC converters, with described in control Two-way DC/DC converters adjust the voltage and current of output direct current so that the two-way DC/DC converters adjust output direct current The voltage of electricity meets the second setting voltage value and/or the electric current of the two-way DC/DC converters adjusting output direct current and expires Sufficient setting electric current value.

Implement the utility model, have the advantages that：When AC power normally can export alternating current, it is closed the Two switches and third switch, are powered for reactor coolant pump by AC power and charged to ultracapacitor group, work as friendship When galvanic electricity source is unable to normal power supply, it can be powered by ultracapacitor group to reactor coolant pump, by reactor coolant The power-on time of pump extends, and the coasting time for improving reactor coolant pump avoids that DNBR occurs, and improves security of system.

Description of the drawings

It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is the circuit diagram that reactor coolant pump provided by the utility model supplies electric installation.

Fig. 2 is the circuit diagram of two-way DC/DC converters provided by the utility model.

Fig. 3 is the structure chart of monitoring and controlling module provided by the utility model.

Fig. 4 is flow of the reactor coolant pump provided by the utility model for an embodiment of the application process of electric installation Figure.

Fig. 5 is that reactor coolant flow changes over time relational graph under three kinds of different schemes provided by the utility model.

Specific embodiment

The utility model provides a kind of reactor coolant pump for electric installation, as shown in Figure 1, the device includes：Super electricity Container group 1, two-way DC/DC converters 6, monitoring and controlling module 9, two-way inverter 7, transformer 4.

The first end of two-way DC/DC converters 6 is electrically connected with ultracapacitor group 1, and the of two-way DC/DC converters 6 The DC side of two ends and two-way inverter 7 is electrically connected, for receiving direct current, and the direct current of reception boosted or It is exported after decompression processing.

The exchange side of two-way inverter 7 is electrically connected by second switch QS2 and transformer 4, also switchs QS3 by third It is electrically connected with AC power 3, for receiving the alternating current of the output of AC power 3, and is direct current electricity output by AC conversion, Or direct current is received, and be exchange electricity output by DC conversion.

Transformer 4 is electrically connected with reactor coolant pump 5, for receiving alternating current, and by the AC conversion of reception To meet the alternating current of the first setting voltage value, and the exchange electricity output of the first setting voltage value will be met to reactor coolant Pump 5.Specifically, transformer 4 and the main pump motor of reactor coolant pump 5 are electrically connected, the first setting voltage value will be met Exchange electricity output to main pump motor.

Monitoring and controlling module 9 is electrically connected with two-way DC/DC converters 6, for acquiring the electricity of two-way 7 DC side of inverter The voltage and current of pressure, the first end of two-way DC/DC converters 6, and according to voltage, the two-way DC/ of two-way 7 DC side of inverter The voltage and current of the first end of DC converters 6 controls the voltage satisfaction second that two-way DC/DC converters 6 export direct current to set The electric current of constant voltage value and/or two-way DC/DC converters 6 output direct current meets setting electric current value.

For storing electric energy, ultracapacitor group 1 receives direct current and charges ultracapacitor group 1, and when its detection Start to discharge after to the main pump motor dead electricity of reactor coolant pump 5.

Further, ultracapacitor group 1 includes at least two ultracapacitor branches in parallel, each ultracapacitor Branch includes the ultracapacitor of at least two series connection.

Ultracapacitor energy storage unit is connected, higher operating voltage can be obtained, by super capacitor energy-storage list Member carries out parallel connection, can realize higher stored energy capacitance, and super electricity can be improved simultaneously using series connection and composite construction in parallel The operating voltage and stored energy capacitance of container group 1.

Preferably, the reactor coolant pump of the utility model further includes battery management system, battery management for electric installation System monitors the parameters such as the voltage of ultracapacitor group 1 in real time, prevents due to ultracapacitor series connection and existing super capacitor Electric voltage equalization problem between device monomer avoids influencing to reactor since one or several ultracapacitor monomer breaks down The main pump motor of coolant pump 5 is powered again.

Further, ultracapacitor group 1 is connect, and ultracapacitor by dc bus with two-way DC/DC converters 6 First switch QS1, filter inductance L and the first filtering are additionally provided on dc bus between group 1 and two-way DC/DC converters 6 Capacitance C1.Specifically, being connected in series between first switch QS1 and filter inductance L, the first filter capacitor C1 is connected in parallel on two-way The first end of DC/DC converters 6, and an end of the first filter capacitor C1 is connected between first switch QS1 and filter inductance L.

Further, reactor coolant pump further includes to carry out discharge test to ultracapacitor group 1 for electric installation Test load 2, ultracapacitor group 1 by the 4th switch QS4 be electrically connected with test load 2.

Further, the second end of two-way DC/DC converters 6 is connect, and two-way by dc bus with two-way inverter 7 The second end of DC/DC converters 6 is also parallel with the second filter capacitor C2.

Further, as shown in Fig. 2, two-way DC/DC converters 6 include：First inversion rectification unit 61, double winding transformation 62 and second inversion rectification unit 63 of device transformer.

First inversion rectification unit 61 is connect with the first end of two-winding transformer transformer 62, for receiving from super The direct current of capacitor group 1, and direct current is converted into exchange electricity output to two-winding transformer transformer 62 or receives Direct current electricity output is converted to ultracapacitor group 1 from the alternating current of two-winding transformer transformer 62, and by alternating current.

Second inversion rectification unit 63 is connect with the second end of two-winding transformer transformer 62, for receiving from double wrap The alternating current of group transformer transformer 62, and alternating current is converted into direct current electricity output to two-way inverter 7 or reception and is come from Direct current is converted to exchange electricity output to two-winding transformer transformer 62 by the direct current of two-way inverter 7.

Two-winding transformer transformer 62 is i.e. there are two winding, and one is input, and one is output.

Further, the first inversion rectification unit 61 and the second inversion rectification unit 63 are single phase bridge type rectifier circu, IGBT that the bridge arm of single phase bridge type rectifier circu is connected in series with for two (Insulated Gate Bipolar Transistor, Insulated gate bipolar transistor) pipe.

Further, as shown in figure 3, monitoring and controlling module 9 includes：Direct current bus voltage detecting circuit 93, super capacitor Voltage detecting circuit 91, current detection circuit 92 and DC/DC controllers 8, wherein, DC/DC controllers 8 include A/D converter 83rd, dsp controller 82 and FPGA (Field-Programmable Gate Array, i.e. field programmable gate array) unit 81。

The both ends of direct current bus voltage detecting circuit 93 respectively with the DC side of two-way inverter 7 and A/D converter 83 Connection, for acquiring the DC bus-bar voltage analog signal of two-way 7 DC side of inverter, and by DC bus-bar voltage analog signal It exports to A/D converter 83.Specifically, the input of direct current bus voltage detecting circuit 93 terminates at two-way 7 direct current of inverter On two dc bus of side, the output of direct current bus voltage detecting circuit 93 terminates to the input terminal of A/D converter 83.

Super-capacitor voltage detection circuit 91, both ends convert respectively with the first end of two-way DC/DC converters 6 and A/D Device connects, for acquiring the super-capacitor voltage analog signal of two-way 6 first end of DC/DC converters, and by super-capacitor voltage Analog signal output is to A/D converter 83.Specifically, the input of super-capacitor voltage detection circuit 91 terminates to two-way DC/ On two dc bus of 6 first end of DC converters, the output of super-capacitor voltage detection circuit 91 terminates to A/D converter 83 Input terminal.

The both ends of current detection circuit 92 connect respectively with the first end of two-way DC/DC converters 6 and A/D converter 83 It connects, for acquiring the inductive current analog signal of the first end of two-way DC/DC converters 6, and inductive current analog signal is defeated Go out to A/D converter 83.Specifically, the input of current detection circuit 92 terminates to the two of two-way 6 first end of DC/DC converters On dc bus, more specifically, the input of current detection circuit 92 terminates to filter inductance L and two-way DC/DC converters 6 Between first end, the output terminal of current detection circuit 92 is connect with the input terminal of A/D converter 83.

A/D converter 83 is connect with dsp controller 82, for by super-capacitor voltage analog signal, DC bus-bar voltage Analog signal and inductive current analog signal are converted into corresponding super-capacitor voltage digital signal, DC bus-bar voltage number Signal and inductive current digital signal, and by super-capacitor voltage digital signal, DC bus-bar voltage digital signal and electricity Inducing current digital signal is exported to dsp controller 82.

Dsp controller 82 is connect with FPGA unit 81, specifically, the data signal input and FPGA of dsp controller 82 The data signal output connection of unit 81, the data signal output of dsp controller 82 and the data-signal of FPGA unit 81 Input terminal connects.Dsp controller 82 is used for according to super-capacitor voltage digital signal, DC bus-bar voltage digital signal and electricity Inducing current digital signal obtains corresponding super-capacitor voltage value, d-c bus voltage value and inductor current value, when super electricity When appearance voltage value is unsatisfactory for the second setting voltage value, the closed-loop control knot of inductive current inner ring and DC bus-bar voltage outer shroud is built Structure, and with DC bus-bar voltage target in order to control, pass through the closed loop controlling structure and export control instruction to FPGA unit 81.

FPGA unit 81 is connect with two-way DC/DC converters 6, for according to control instruction, generating corresponding completion carrier wave PWM (Pulse Width Modulation, pulse width modulation) pulse-modulated signal of phase shift, and pwm pulse is modulated and is believed Number output two-way DC/DC converters 6 to be controlled to adjust the voltage and current of output direct current, makes to two-way DC/DC converters 6 It obtains two-way DC/DC converters 6 and adjusts the second setting voltage value of voltage satisfaction of output direct current and/or two-way DC/DC converters 6 electric currents for adjusting output direct current meet setting electric current value.Specifically, the signal output end connection of FPGA unit 81 is two-way The single phase bridge type rectifier circu of DC/DC converters 6 is controlled by PWM delivery outlet signal on single phase bridge type rectifier circu The conducting and shutdown of IGBT pipes, to adjust the voltage and current that two-way DC/DC converters 6 adjust output direct current.FPGA unit 81 can also carry out fault detect and protection to reactor coolant pump for electric installation.

FPGA unit 81 according to DC bus-bar voltage and super-capacitor voltage, DC bus-bar voltage is carried out outer loop feedback, Closed-loop control and system overvoltage protection.FPGA unit 81 according to super inductance electric current carry out inner ring current feedback, closed-loop control and System overcurrent protection.

Reactor coolant pump provided by the utility model is as follows for electric installation operation principle：

When third switch QS3 be closed after, by two-way inverter 7, two-way DC/DC converters 6 to ultracapacitor group 1 into Row charging, the main pump motor of reactor coolant pump 5 be in the voltage at accidental conditions and 1 both ends of ultracapacitor group compared with It is low, when voltage value is set less than second, two-way DC/DC converters 6 are controlled, control two-way DC/DC converters 6 using permanent Stream mode is to the super capacitor floating charging of ultracapacitor group 1.When the voltage at 1 both ends of ultracapacitor group reaches the second setting electricity During pressure value, the charging current of ultracapacitor group 1 will be gradually reduced, at this point, by monitoring and controlling module 9 to two-way DC/DC Converter 6 is controlled, and two-way DC/DC converters 6 is controlled to switch to constant voltage mode and are charged to ultracapacitor group 1, until Ultracapacitor group 1 is fully charged, realizes and the charging current of ultracapacitor group 1 is monitored and controlled.

When nuclear power station is in full factory's dead electricity operating mode, in order to meet the requirement of main pump running down, need by ultracapacitor group 1 After the piezoelectric voltage of direct current for exporting ultracapacitor group 1 through two-way DC/DC converters 6 is converted, by two-way inversion Alternating current is carried out the backward reactor coolant pump 5 of boosting processing by transformer 4 and supplied by 7 inverse of the DC into AC of device Electricity so as to control main pump rotor speed decline curve, slows down water loop flow velocity rate of descent.

During nuclear power station is in compressor emergency shutdown maintenance, it can be discharged by test load 2 ultracapacitor group 1 Experiment, to verify the discharge capability of ultracapacitor, ensures the performance of ultracapacitor and examines the capacity of ultracapacitor.It puts Electric test load 2 is mainly made of resistance and inductance, and the parameter of resistance and inductance need to avoid that series resonance occurs with capacitance, burn Circuit.

Reactor coolant pump provided by the utility model is for the control strategy of electric installation：

(1) assume main pump normal operation, AC power 3 works normally, and main pump motor detection circuit detects normally at this time Voltage and current；

(2) assume that AC power 3 is lost, main pump motor detection circuit, which detects, at this time loses voltage and excitation, surpasses at this time Grade capacitor group 1 detects main pump motor dead electricity, and super capacitor starts to discharge；

(3) ultracapacitor group 1 is in main pump motor operational process, current detection circuit 92, super-capacitor voltage detection Circuit 91 and direct current bus voltage detecting circuit 93 detect inductive current, super-capacitor voltage value U1 and DC bus-bar voltage respectively The analog signal of value U2, it is then using A/D converter 83 that the inductive current detected, super-capacitor voltage value U1 and direct current is female The analog signal of line voltage value U2 is converted into digital signal, and is transported in dsp controller 82；

(4) by the super-capacitor voltage value U1 detected in step (3), by super capacitor electricity in dsp controller 82 Pressure value U1 is compared with the lower limit value (the i.e. second setting voltage value) set, when super-capacitor voltage value U1 is higher than lower limit value, Dsp controller 82, with reference to the d-c bus voltage value U2 and inductive current of detection, is formed with DC bus-bar voltage target in order to control The closed-loop control of inductive current inner ring and DC bus-bar voltage outer shroud, the set-point of DC bus-bar voltage closed loop are slightly above diode The DC voltage value obtained after rectifier bridge rectification, closed loop adjusts output to FPGA unit 81, and realizes PWM in FPGA unit 81 Modulation is realized to single phase bridge type rectifier circu between two-way 6 high-pressure side of DC/DC converters and low-pressure end so as to generate switching signal Energy conversion.

The utility model also provides the application process that a kind of reactor coolant pump supplies electric installation, applied to above-mentioned reaction For electric installation, this method includes the following steps reactor coolant pump：

When reactor coolant pump 5 does not have dead electricity, first switch QS1, second switch QS2 and third switch QS3 are closed, It is charged to ultracapacitor group 1 by AC power 3, and powered for reactor coolant pump 5；

When 5 dead electricity of reactor coolant pump, first switch QS1 and second switch QS2 is closed, disconnects third switch QS3, It is powered from ultracapacitor group 1 to reactor coolant pump 5.

Further, which further includes following step：

When reactor coolant pump 5 does not have dead electricity, first switch QS1 is disconnected, the 4th switch QS4 is closed, passes through experiment 2 pairs of ultracapacitor groups 1 of load carry out charge-discharge test.

It is supplied in reactor coolant pump in another embodiment of the application process of electric installation, as shown in figure 4, when reactor is cold But the main pump motor of agent pump 5 is not when having dead electricity, by disconnect the 4th switch QS4, be closed first switch QS1, second switch QS2 and Third switchs QS3, to realize to 1 floating charging of ultracapacitor group and be powered by AC power 3 to main pump electrode,；Work as master When pump electrode does not have dead electricity, the 4th switch QS4 can also be closed, by disconnecting first switch QS1 to realize ultracapacitor group 1 regular discharge test.When main pump motor dead electricity, QS3 is switched by disconnecting third, is closed first switch QS1 and second switch QS2, to realize that ultracapacitor group 1 powers to main pump motor.

The utility model has fully considered the technological deficiency of above-mentioned flywheel energy storage and the requirement of main pump coasting time, adopts The power conversion unit as ultracapacitor group 1 and two-way DC/DC converters 6 carries out power by DC/DC converters Transformation and frequency control, control the rotating speed of main pump after dead electricity, can extend main pump power-on time, extend the time by super The factors such as absorbed power are related when the capacity of capacitor, main pump running down.Main pump rotor speed can be controlled to decline well simultaneously Curve slows down water loop flow velocity rate of descent, so as to improve reactor coolant loop safety, and reduces reactor coolant system System and the design difficulty of main pump and manufacture cost, make system design become simple.

The utility model can be used for solving under full factory's dead electricity operating mode in nuclear power station design process, during due to main pump running down Between short, the problem of reactor is forced shutdown.

By the utility model, it can fully simplify main pump conceptual design complexity, reactor coolant loop scheme Complexity is designed, and reduces the manufacture cost of main pump.

Ultracapacitor has the spies such as energy conversion efficiency height, lighter weight, current density are high, operating temperature range is wide Point, the utility model use ultracapacitor group 1, two-way DC/DC converters 6, two-way inverter 7 and monitoring and controlling module 9, In nuclear power station design process, it is contemplated that full factory dead electricity operating mode carries out emergency service by ultracapacitor group 1 to main pump, from And the main pump coasting time is improved, improve emergency capability of the reactor coolant loop under full factory's dead electricity operating mode.

Main pump motor rotating speed is related with electric voltage frequency f, motor number of pole-pairs p and revolutional slip s, i.e. n=(60f (1-s))/p, In main pump motor operation, electric voltage frequency f is adjusted, can achieve the purpose that adjust motor speed.Using the principle, can flexibly adjust The curve of main pump motor rotor speed change curve and reactor coolant flow at any time under Zheng Quan factories dead electricity operating mode, from And improve security of system and flexibility.As shown in figure 5, under full factory's dead electricity operating mode, super capacitor scheme is relative to flywheel side Case and without energy storage scheme for, the time that reactor coolant flow is maintained to fixed numbers is longer, have longer main pump Coasting time.

Two-way DC/DC converters 6 can change voltage output frequency, use when main pump motor starts and opened compared with the slow-speed of revolution It is dynamic, change the voltage output frequency of two-way DC/DC converters 6 again after main pump motor rotating speed rises, main pump motor rotating speed is carried It is raised to rated speed.Using the principle, frequency control, the tune when machine is piled up in reaction can be carried out using two-way DC/DC converters 6 The startup strategy of whole main pump realizes the soft start of motor, reduces in main pump start-up course that main pump motor absorbs a large amount of active Power and station service electrical system is caused to impact, inhibit high voltage auxiliary power frequency, voltage fluctuation.

The above content is combine specific preferred embodiment further detailed description of the utility model, it is impossible to Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, several simple deduction or replace can also be made, should all be regarded To belong to the scope of protection of the utility model.

Claims (8)

1. a kind of reactor coolant pump supplies electric installation, which is characterized in that including：Ultracapacitor group, two-way DC/DC transformation Device, monitoring and controlling module, two-way inverter, transformer；

The two-way DC/DC converters, first end and the ultracapacitor group are electrically connected, second end with it is described two-way inverse The DC side for becoming device is electrically connected, for receiving direct current, and by the direct current of reception boosted or decompression processing after it is defeated Go out；

The two-way inverter, exchange side are electrically connected by second switch and the transformer, also by third switch with AC power is electrically connected, and for receiving the alternating current of the AC power output, and is direct current electricity output by AC conversion, Or direct current is received, and be exchange electricity output by DC conversion；

The transformer is electrically connected with reactor coolant pump, for receiving alternating current, and by the AC conversion of reception is Meet the alternating current of the first setting voltage value, and exchange electricity output to the reactor for meeting the first setting voltage value is cooled down Agent pumps；

The monitoring and controlling module is electrically connected with the two-way DC/DC converters, for acquiring the two-way inverter direct current The voltage of side, the two-way DC/DC converters first end voltage and current, and according to the two-way inverter direct-flow side Voltage, the two-way DC/DC converters first end voltage and current, the control two-way DC/DC converters output direct current The voltage of electricity meets the second setting voltage value and/or the electric current of the two-way DC/DC converters output direct current meets setting electricity Flow valuve；

The ultracapacitor group, charges for receiving direct current, and when it detects that the reactor coolant pump loses Start to discharge after electricity.

2. reactor coolant pump according to claim 1 supplies electric installation, which is characterized in that the ultracapacitor group packet At least two ultracapacitor branches in parallel are included, each ultracapacitor branch includes the super capacitor of at least two series connection Device.

3. reactor coolant pump according to claim 1 supplies electric installation, which is characterized in that the ultracapacitor group is led to Dc bus is crossed to connect with the two-way DC/DC converters, and the ultracapacitor group and the two-way DC/DC converters it Between dc bus on be additionally provided with first switch, filter inductance and the first filter capacitor.

4. reactor coolant pump according to claim 3 supplies electric installation, which is characterized in that further includes for described super Grade capacitor group carries out the test load of discharge test, and the test load is made of resistance and inductance, the ultracapacitor Group is electrically connected by the 4th switch with the test load.

5. reactor coolant pump according to claim 3 supplies electric installation, which is characterized in that the two-way DC/DC transformation The second end of device is connect by dc bus with the two-way inverter, and the second end of the two-way DC/DC converters is also simultaneously It is associated with the second filter capacitor.

6. reactor coolant pump according to claim 5 supplies electric installation, which is characterized in that the two-way DC/DC transformation Device includes：First inversion rectification unit, two-winding transformer and the second inversion rectification unit；

The first inversion rectification unit, connect with the first end of the two-winding transformer, for receiving from described super The direct current of capacitor group, and direct current is converted into exchange electricity output to the two-winding transformer or is received from institute The alternating current of two-winding transformer is stated, and alternating current is converted into direct current electricity output to the ultracapacitor group；

The second inversion rectification unit, connect with the second end of the two-winding transformer, for receiving from the double wrap The alternating current of group transformer, and alternating current is converted into direct current electricity output to the two-way inverter or is received from described Direct current is converted to exchange electricity output to the two-winding transformer by the direct current of two-way inverter.

7. reactor coolant pump according to claim 6 supplies electric installation, which is characterized in that the first inversion rectification list First and described second inversion rectification unit is single phase bridge type rectifier circu, and the bridge arm of the single phase bridge type rectifier circu is two The IGBT pipes being connected in series with.

8. reactor coolant pump according to claim 7 supplies electric installation, which is characterized in that the monitoring and controlling module packet It includes：Direct current bus voltage detecting circuit, super-capacitor voltage detection circuit, current detection circuit and DC/DC controllers, In, the DC/DC controllers include A/D converter, dsp controller and FPGA unit；

The direct current bus voltage detecting circuit, both ends are converted respectively with the DC side of the two-way inverter and the A/D Device connects, for acquiring the DC bus-bar voltage analog signal of the two-way inverter direct-flow side, and the dc bus is electric Analog signal output is pressed to the A/D converter；

The super-capacitor voltage detection circuit, both ends respectively with the first end of the two-way DC/DC converters and the A/D Converter connects, for acquiring the super-capacitor voltage analog signal of two-way DC/DC converters first end, and by the super electricity Hold voltage analog signal to export to the A/D converter；

The current detection circuit, both ends connect respectively with the first end of the two-way DC/DC converters and the A/D converter It connects, for acquiring the inductive current analog signal of the first end of the two-way DC/DC converters, and the inductive current is simulated Signal is exported to the A/D converter；

The A/D converter is connect with the dsp controller, for by the super-capacitor voltage analog signal, dc bus Voltage analog signal and the inductive current analog signal are converted into corresponding super-capacitor voltage digital signal, dc bus Voltage digital signal and inductive current digital signal, and the super-capacitor voltage digital signal, the dc bus is electric Pressure digital signal and the inductive current digital signal are exported to the dsp controller；

The dsp controller is connect with the FPGA unit, for according to the super-capacitor voltage digital signal, described straight Stream busbar voltage digital signal and the inductive current digital signal obtain corresponding super-capacitor voltage value, dc bus electricity Pressure value and inductor current value, when the super-capacitor voltage value is unsatisfactory for the second setting voltage value, structure inductance electricity The closed loop controlling structure of inner ring and DC bus-bar voltage outer shroud is flowed, and passes through the closed loop controlling structure and exports control instruction to described FPGA unit；

The FPGA unit is connect with the two-way DC/DC converters, for according to the control instruction, generating corresponding PWM Pulse-modulated signal, and the PWM delivery outlet signal is exported to the two-way DC/DC converters, it is described two-way to control DC/DC converters adjust the voltage and current of output direct current so that the two-way DC/DC converters adjust output direct current Voltage meets the second setting voltage value and/or the electric current satisfaction of the two-way DC/DC converters adjusting output direct current is set Constant current value.