CN103036253A - Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency - Google Patents
Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency Download PDFInfo
- Publication number
- CN103036253A CN103036253A CN2012105195064A CN201210519506A CN103036253A CN 103036253 A CN103036253 A CN 103036253A CN 2012105195064 A CN2012105195064 A CN 2012105195064A CN 201210519506 A CN201210519506 A CN 201210519506A CN 103036253 A CN103036253 A CN 103036253A
- Authority
- CN
- China
- Prior art keywords
- frequency
- load
- control
- power plant
- nuclear power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The invention discloses a control method of nuclear power plant unit frequency and a control system of the nuclear power plant unit frequency. The method comprises the steps of judging load control modes of a nuclear power plant unit; adjusting the unit frequency in a frequency contribution method when the nuclear power plant unit runs in a basic load control mode or in an automatic load control mode and power grid frequency changes cause rotating speed changes of a turbine; adjusting the unit frequency in a frequency control method when the nuclear power plant unit runs in a return circuit mode of a load controller with a frequency adjusting function and power grid load changes cause frequency fluctuation; and sending a turbine load reference value, a load controller return circuit input signal, a frequency contribution signal, a frequency control signal, a turbine valve opening reference value signal and a turbine fast load down signal to a reactor control rod system of a nuclear island by the side of the turbine for frequency control of the side of the nuclear island. According to the control method of the nuclear power plant unit frequency and the control system of the nuclear power plant unit frequency, steady running of the nuclear power plant unit is guaranteed when the nuclear power plant unit is used for power grid frequency control.
Description
Technical field
The present invention relates to the FREQUENCY CONTROL field of nuclear power plant, relate in particular to control method and the system of a kind of nuclear power plant machine class frequency.
Background technology
Frequency is one of most important operational factor of electric power system, and frequency change has important impact to the safe and stable operation of electric power system.
Since total generated output of net unit with connect the net total load do not mate the fluctuation that will cause mains frequency, if connect the net load greater than at the total generated output of net unit, will cause mains frequency to descend, otherwise increase.It is constant to keep the mains frequency value, comes balanced power and load, i.e. the control of frequency with regard to requiring in the active power that the change of net unit automatic or manual is carried to electrical network.
The nuclear power generating sets rear requirement that equally also needs to follow electrical network of being incorporated into the power networks participates in frequency modulation, but because high, the system complex of nuclear power generating sets security requirement, building time is long, construction investment is huge etc. characteristics, nuclear power generating sets should be with basic load operation for a long time, should not participate in the control of the frequency of electrical network.But electrical network requires every unit that is incorporated into the power networks just must participate in the control of the frequency of electrical network at present.
The FREQUENCY CONTROL function of nuclear power plant's unit realizes by steam turbine control system (GRE) and reactor control rod system (RGL), after nuclear power generating sets are incorporated into the power networks, the control of how steam turbine control system and reactor control rod system being carried out frequency becomes new technical barrier with the safe and stable operation that guarantees electric power system, does not also have good solution in the prior art.
Summary of the invention
The technical problem to be solved in the present invention is can allow again when can't realize guaranteeing nuclear power generating sets stable operation in the prior art nuclear power generating sets participate in the defective of the FREQUENCY CONTROL of electrical network, a kind of technical barrier that nuclear power generating sets participate in mains frequency control that solves is provided, guarantees that nuclear power generating sets guarantee control method and the system of nuclear power plant's machine class frequency of nuclear power generating sets stable operation when participating in mains frequency control.
The technical solution adopted for the present invention to solve the technical problems is:
The control method of a kind of nuclear power plant machine class frequency is provided, may further comprise the steps:
Judge the load control model of nuclear power plant's unit, described load control model comprises base load control model, automatic Load control model, has the load governor circuit pattern of frequency modulation function and control model that central dispatching is loaded;
If nuclear power plant's unit moves under described base load control model or described automatic Load control model, and mains frequency changes and to cause when turbine speed changes, and regulates the machine class frequency by the mode of frequency contributions;
If nuclear power plant's unit moves having under the load governor circuit pattern of frequency modulation function or the control model that central dispatching is loaded, and network load changes when causing frequency fluctuation, regulates the machine class frequency by the mode of FREQUENCY CONTROL;
The signal of the frequency contributions signal under the transmission frequency contribution mode, the frequency control signal under the frequency control system and the steam turbine valve aperture reference value under the different frequency control mode, the load governor loop input signal with frequency modulation function and the quick load down signal of steam turbine are to the reactor control rod system of nuclear island, so that it carries out the FREQUENCY CONTROL of nuclear island side.
In the control method of nuclear power plant of the present invention machine class frequency, described mode by frequency contributions is regulated the machine class frequency and is specifically comprised:
Mains frequency changes and causes when turbine speed changes, and obtains the rotating speed of target of operator's manual setting;
Described rotating speed of target is obtained speed setting value through the restriction of raising speed rate and Thermal Stress Control;
Calculate the rotating speed deviation of actual measurement rotating speed and described speed setting value;
Calculate the steam flow offset according to described rotating speed deviation;
Described steam flow offset is added on the steam demand amount that calculates under the different mode, obtains effective steam demand amount;
According to described effective steam demand amount correction steam turbine valve aperture reference value, to change unit generation power, realize the adjusting of frequency.
In the control method of nuclear power plant of the present invention machine class frequency, described mode by FREQUENCY CONTROL is regulated the machine class frequency and is specifically comprised:
Network load changes when causing the steam turbine frequency fluctuation, obtains given target load;
Described target load is obtained the load reference value of steam turbine through the restriction of load up speed and Thermal Stress Control;
The load correction value of getting it right and answering according to described rotating speed drift gage;
Described load correction value and described load reference value superposeed form the load setting value;
Obtain the actual power power of unit, calculate the difference of described load setting value and described actual load, and form effective steam demand amount through the proportional plus integral control computing;
The signal that will comprise described steam demand amount is revised steam turbine valve aperture reference value with the aperture of by-pass valve control after through steam flow restriction and pressure limit, and the exerting oneself of change unit is until frequency retrieval is normal.
In the control method of nuclear power plant of the present invention machine class frequency, described given target load is given by operator or the central dispatching of master-control room.
In the control method of nuclear power plant of the present invention machine class frequency, also comprise step:
Change or network load changes when causing the steam turbine frequency change at mains frequency, judge that the steam turbine frequency change is whether in default frequency dead band, if, the mode of frequency contributions that then no thoroughfare or the mode of FREQUENCY CONTROL are regulated the machine class frequency, if not, then according to frequently characteristic curve adjusting of merit machine class frequency.
The present invention solves another technical scheme that its technical problem adopts:
The control system of a kind of nuclear power plant machine class frequency is provided, comprises:
Load control model judging unit, be used for judging the load control model of nuclear power plant's unit, described load control model comprises base load control model, automatic Load control model, has the load governor circuit pattern of frequency modulation function and control model that central dispatching is loaded;
Frequency contributions mode regulon moves under described base load control model or described automatic Load control model if be used for nuclear power plant's unit, and mains frequency changes and cause when turbine speed changes, and regulates the machine class frequency by the mode of frequency contributions;
The frequency control system regulon, if being used for nuclear power plant's unit moves having under the load governor circuit pattern of frequency modulation function or the control model that central dispatching is loaded, and network load changes when causing frequency fluctuation, regulates the machine class frequency by the mode of FREQUENCY CONTROL;
Signal transmitting module, be used for the signal of frequency contributions signal, the frequency control signal under the frequency control system and the steam turbine valve aperture reference value under the different frequency control mode under the transmission frequency contribution mode, the load governor loop input signal with frequency modulation function and the quick load down signal of steam turbine to the reactor control rod system of nuclear island, so that it carries out the FREQUENCY CONTROL of nuclear island side.
In the control system of nuclear power plant of the present invention machine class frequency, described frequency contributions mode regulon specifically comprises:
The rotating speed of target acquiring unit is used for mains frequency and changes when causing the turbine speed variation, obtains the rotating speed of target of operator's manual setting;
The tach signal processing unit is used for described rotating speed of target is obtained speed setting value through the restriction of raising speed rate and Thermal Stress Control;
Rotating speed deviation computing unit is used for calculating the rotating speed deviation of surveying rotating speed and described speed setting value;
The steam flow compensation value calculation unit is used for calculating the steam flow offset according to described rotating speed deviation;
Effectively the steam demand amount obtains the unit, is used for described steam flow offset is added to the steam demand amount that calculates under the different mode, obtains effective steam demand amount;
Steam turbine valve aperture reference value amending unit is used for revising positive steam turbine valve aperture reference value according to described effective steam demand amount, to change unit generation power, realizes the adjusting of frequency.
In the control system of nuclear power plant of the present invention machine class frequency, described frequency control system regulon specifically comprises:
The target load acquiring unit is used for network load and changes when causing the steam turbine frequency fluctuation, obtains given target load;
The load signal processing unit is used for the load reference value of described target load through the restriction acquisition steam turbine of load up speed and Thermal Stress Control;
Load correction value computing unit is used for the load correction value of getting it right and answering according to described rotating speed drift gage;
Effectively steam demand amount computing unit for the actual power power that obtains unit, calculates the difference of described load setting value and described actual load, and forms effective steam demand amount through the proportional plus integral control computing;
Steam turbine valve aperture instruction generation unit for generating the instruction of steam turbine valve aperture with the aperture of by-pass valve control after the signal process steam flow restriction that will comprise described steam demand amount and the pressure limit, changes exerting oneself of unit, until frequency retrieval is normal.
In the control system of nuclear power plant of the present invention machine class frequency, described given target load is given by operator or the central dispatching of master-control room.
In the control system of nuclear power plant of the present invention machine class frequency, this control system also comprises frequency dead band control unit, be used for changing or network load changes when causing the steam turbine frequency change at mains frequency, judge that the steam turbine frequency change is whether in default frequency dead band, if, the mode of frequency contributions that then no thoroughfare or the mode of FREQUENCY CONTROL are regulated the machine class frequency, if not, and then according to frequently characteristic curve adjusting of merit machine class frequency.
The beneficial effect that the present invention produces is: the present invention rationally controls by the frequency of steamer pusher side and nuclear island side, solved nuclear power generating sets and participated in the technical barrier that mains frequency is controlled, at the safe and stable operation that guarantees to have guaranteed when nuclear power generating sets are participating in mains frequency control unit.
Further, by rational frequency modulation dead band parameter is set, drop into the FREQUENCY CONTROL of suitable capacity, both guaranteed the operation that unit safety is stable, guarantee that again mains frequency changes within the range of permission.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the flow process intention of the control method of embodiment of the invention nuclear power plant machine class frequency;
Fig. 2 is that the mode that the embodiment of the invention is passed through frequency contributions is regulated machine class frequency particular flow sheet;
Fig. 3 is that the mode that the embodiment of the invention is passed through FREQUENCY CONTROL is regulated machine class frequency particular flow sheet;
Fig. 4 is the control logic figure of the control method of embodiment of the invention steamer pusher side frequency;
Fig. 5 is the control logic figure of embodiment of the invention nuclear island side FREQUENCY CONTROL function;
Fig. 6 is the structural representation of the control system of embodiment of the invention nuclear power plant machine class frequency.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the invention is studied the implementation method of FREQUENCY CONTROL in nuclear power plant mainly for the operation characteristic of PWR nuclear power plant.
The machine class frequency was consistent (being 50HZ) with mains frequency after steam turbine was incorporated into the power networks, and changed when network load (electricity consumption) and unit actual power load (generating) can cause mains frequency when not mating, and physical relationship is that certain functional relation is arranged.Since total generated output of net unit with connect the net total load do not mate the fluctuation that will cause mains frequency, if connect the net load greater than at the total generated output of net unit, will cause mains frequency to descend, otherwise increase.It is constant to keep the mains frequency value, comes balanced power and load, i.e. the control of frequency with regard to requiring in the active power that the change of net unit automatic or manual is carried to electrical network.
The FREQUENCY CONTROL function of nuclear power plant's unit realizes by steam turbine control system (GRE) and reactor control rod system (RGL).The FREQUENCY CONTROL function has two kinds of implementations in nuclear power plant's unit: frequency contributions and FREQUENCY CONTROL.Frequency contributions refers to utilize the governing system characteristic under manual control model, regulates the aperture of steam turbine pitch, utilizes the quantity of steam that the rotating speed deviation is calculated needs compensation, direct compensation steam demand amount.FREQUENCY CONTROL is that the amount of electrical power that the mains frequency drift gage calculates is added on the load reference value of unit, guarantees the stable of mains frequency by the generated output that changes Steam Turbine.The unit continuous action that nuclear power plant's unit avoids the minor fluctuations because of network load to cause by the frequency dead band is set is to guarantee the stable operation of nuclear power generating sets.
When unit red switch (about 99.3%) when being about to reach the unit rated speed, synchronizer is with unit and upper electrical network, and unit has namely entered the load control model.The load control model is divided into four kinds: base load control BC, automatic Load are controlled AC, are had the load governor circuit type (load controlleron) of frequency modulation function and control mode that central dispatching is loaded (master load control).
As shown in Figure 1, the control method of embodiment of the invention nuclear power plant machine class frequency, mainly the control system by the machine class frequency in the steam turbine control system (GRE) realizes, specifically may further comprise the steps:
The load control model of S1, judgement nuclear power plant unit, the load control model comprises base load control model, automatic Load control model, has the load governor circuit pattern of frequency modulation function and control model that central dispatching is loaded; Wherein, central dispatching institute pattern lower frequency control mode is the same with mode of frequency regulation under the load governor circuit pattern with frequency modulation function, and difference is that target load is given by scheduling under the dispatching office pattern.
If S2 nuclear power plant unit moves under base load control model or automatic Load control model, and mains frequency changes and to cause when turbine speed changes, and regulates the machine class frequency by the mode of frequency contributions;
If S3 nuclear power plant unit moves having under the load governor circuit pattern of frequency modulation function or the control model that central dispatching is loaded, and network load changes when causing frequency fluctuation, regulates the machine class frequency by the mode of FREQUENCY CONTROL;
The signal of the frequency contributions signal under S4, the transmission frequency contribution mode, the frequency control signal under the frequency control system and the steam turbine valve aperture reference value under the different frequency control mode, the load governor loop input signal with frequency modulation function and the quick load down signal of steam turbine are to the reactor control rod system of nuclear island, so that it carries out the FREQUENCY CONTROL of nuclear island side.
In one embodiment of the present of invention, as shown in Figure 2, regulate the machine class frequency by the mode of frequency contributions among the step S2 and specifically comprise:
S21, mains frequency change when causing the steam turbine frequency change, obtain the rotating speed of target of operator's manual setting;
S22, rotating speed of target is obtained speed setting value through the restriction of raising speed rate and Thermal Stress Control; Can be undertaken by the function that sets in advance obtaining speed setting value after signal is processed.
The rotating speed deviation of S23, calculating actual measurement rotating speed and speed setting value;
S24, calculate the steam flow offset according to the rotating speed deviation;
S25, the steam flow offset is added on the steam demand amount that calculates under the different mode, obtains effective steam demand amount; Have certain functional relation between rotating speed deviation and the steam turbine steam demand amount, just obtain the value of corresponding steam demand amount by the rotating speed deviation divided by synchronous gradient, can the percentage form represent.
S26, basis be steam demand amount correction steam turbine valve aperture reference value effectively, namely generates steam turbine valve aperture control command, to change unit generation power, realizes the adjusting of frequency.
In one embodiment of the present of invention, as shown in Figure 3, regulate the machine class frequency by the mode of FREQUENCY CONTROL among the step S3 and specifically comprise:
S31, network load change when causing the steam turbine frequency fluctuation, obtain given target load;
S32, target load is processed the load reference value that obtains steam turbine through the restriction of load up speed, Thermal Stress Control and default load signal;
S33, the load correction value of getting it right and answering according to the rotating speed drift gage;
S34, the correction value of will loading superpose with the load reference value and form the load setting value;
S35, obtain the actual power power of unit, the difference of calculated load set point and actual load, and form effective steam demand amount through the proportional plus integral control computing;
Revise steam turbine valve aperture reference value with the aperture of by-pass valve control after S36, the signal process steam flow restriction that will comprise the steam demand amount and the pressure limit, namely generate steam turbine valve aperture control command, change exerting oneself of unit, until frequency retrieval is normal.
In embodiments of the present invention, given target load is given by operator or the central dispatching of master-control room.Central dispatching passes through the Real Time Monitoring mains frequency and changes, and calculates the network load breach, and redistributes load to unit, to realize the non differential regulation of mains frequency.
In nuclear power plant's FREQUENCY CONTROL, in order to guarantee the stable operation of unit, be provided with the frequency dead band, when the frequency dead band referred to that generating unit speed (frequency) changes in dead zone range, the FREQUENCY CONTROL of unit was failure to actuate, to guarantee the stability of unit; Exceeded dead zone range when generating unit speed (frequency) changes, FREQUENCY CONTROL is according to frequently characteristic curve action of merit.Unit is under the load control model, and steamer pusher side FREQUENCY CONTROL function exists always and can't excise.But switching can be carried out by the master-control room picture by operator in the frequency dead band.
The selection in frequency dead band needs and electrical network negotiation in place determines, angle from electrical network, to wish not establish the dead band as far as possible, but the frequency dead band is the bigger the better for unit, so need to obtain considering aspect unit control ability, capacity of equipment and the economy, the frequency dead band is a restricted function.
Because be provided with the frequency dead band, the method for the embodiment of the invention also comprises step:
Change or network load changes when causing the steam turbine frequency change at mains frequency, judge that the steam turbine frequency change is whether in default frequency dead band, if, the mode of frequency contributions that then no thoroughfare or the mode of FREQUENCY CONTROL are regulated the machine class frequency, if not, then according to frequently characteristic curve adjusting of merit machine class frequency.
As shown in Figure 4, be the control logic figure of the control method of steamer pusher side frequency.When unit moves under base load control model BC or automatic Load control model AC, when the mains frequency variation causes that turbine speed changes, unit will be regulated the machine class frequency by the mode of frequency contributions, rotating speed of target is by operator's manual setting, through the raising speed rate, the restriction of Thermal Stress Control forms speed setting value through the tach signal processing unit, the deviation of actual measurement rotating speed and speed setting value is by the poor effect of accent (frequency contributions unit) of governing system, obtaining effective steam flow offset (frequency contributions signal) is added on the steam demand amount that BC load setting value calculates and (perhaps loads controlled condition when satisfying as AC, the control of AC load drops into, on the steam demand amount that the load definite value that AC load control model lower-pilot person arranges is calculated) obtain effective steam demand amount, revise the steam turbine valve aperture, thereby and change unit generation power, realize the adjusting of frequency.
Drop in the effective situation of signal in the load governor loop with frequency modulation function, frequency modulation function is realized by frequency control system, drops into the FREQUENCY CONTROL function and compensates because network load changes the frequency fluctuation that causes, the physical quantity of compensation is amount of electrical power.Shown in Fig. 1 the latter half.At this moment, target load is through load up speed, the restriction of Thermal Stress Control forms the load reference value of steam turbine, the poor load correction value that calculates of frequency during FREQUENCY CONTROL (rotating speed) piece of writing: frequency control signal (by frequency control unit output) superposes with the load reference value and forms the load setting value, computing forms effective steam demand amount to the difference of load setting value and actual load (the actual power power of unit) through PI, steam demand amount signal through steam flow restriction and pressure limit after as the aperture of steam turbine valve aperture instruction by-pass valve control, thereby change exerting oneself of unit, until frequency retrieval is normal.
The basic purpose of reactor control is that the thermal power that a loop is produced equates with the thermal power that secondary circuit absorbs, this will ask the variation of reactor capability must follow the tracks of network load to change, but the movement of control rod is too frequent and cause the core power skewness should avoid simultaneously following the tracks of network load and change the time.In order to satisfy the demand, compressed water reactor nuclear power adopts the operational mode of Steam Generator in Load Follow (G pattern) at present, and reactor G pattern is passed through regulating power rod and adjustment rod (R rod) and regulated the realization of moderator boric acid concentration to reactive control.
When the steamer pusher side has participated in electrical network frequency modulation, the reactor side needs simultaneously action, the frequency modulation the dead time of reactor side is larger than steamer pusher side, to prevent the frequent movement of power rod, and when large mains frequency disturbance, two frequency control signals are excised by two hand switches in the control room, with excision reactor frequency modulation function, to guarantee the stable and safety of nuclear power plant.
When nuclear island side and steamer pusher side carry out FREQUENCY CONTROL synchronously, the steamer pusher side need to drop into signal, frequency contributions signal, frequency control signal, steam turbine valve aperture reference value signal and the quick load down signal of steam turbine with steam turbine load reference value, load governor loop, and the load down signal is that the command signal that the steamer pusher side is issued nuclear island is delivered to the nuclear island reactor control rod RGL of system fast.Because of failure and other reasons, Steam Turbine will reduce present electricity power, at this moment needs this signal is sent nuclear island, and the nuclear island side also will take measures to make the thermal power of nuclear island side generation consistent with the thermal power that steam turbine needs.
Fig. 5 is the control logic of nuclear island side FREQUENCY CONTROL function.F among Fig. 5 (x1) and f (x2) are function generators, be respectively frequency contributions signal and frequency control signal the frequency dead band is set.The safety that can consider the nuclear island side that arranges in frequency dead band arranges the dead band, and this frequency dead band is also larger than steamer pusher side, take the action that reduces the nuclear island control rod as far as possible as foundation.The switching of frequency contributions mode and frequency control system is carried out in the effect that the frequency control system of nuclear island side drops into signal by the load governor loop with frequency modulation function.The condition of a switching of signal is dropped in the load governor loop, and when did not drop in the load governor loop with frequency modulation function, the RGL of reactor control rod system carried out frequency modulation by the frequency contributions mode; When dropped in the load governor loop with frequency modulation function, the RGL of reactor control rod system carried out frequency modulation by frequency control system; The frequency contributions signal compensation be steam flow, frequency control signal compensation be amount of electrical power.
But when the quick load down signal of steam turbine comes, will cut off the frequency modulation function of nuclear island side, nuclear island is directly followed the tracks of valve opening.
The control system of embodiment of the invention nuclear power plant machine class frequency, it belongs to steam turbine control system (GRE) as shown in Figure 6, comprising:
Load control model judging unit 10, be used for judging the load control model of nuclear power plant's unit, the load control model comprises base load control model, automatic Load control model, has the load governor circuit pattern of frequency modulation function and control model that central dispatching is loaded;
Frequency contributions mode regulon 20 moves under base load control model or automatic Load control model if be used for nuclear power plant's unit, and mains frequency changes and cause when turbine speed changes, and regulates the machine class frequency by the mode of frequency contributions;
Frequency control system regulon 30, if being used for nuclear power plant's unit moves having under the load governor circuit pattern of frequency modulation function or the control model that central dispatching is loaded, and network load changes when causing frequency fluctuation, regulates the machine class frequency by the mode of FREQUENCY CONTROL;
Signal transmitting module 40, be used for the signal of frequency contributions signal, the frequency control signal under the frequency control system and the steam turbine valve aperture reference value under the different frequency control mode under the transmission frequency contribution mode, the load governor loop input signal with frequency modulation function and the quick load down signal of steam turbine to the reactor control rod system of nuclear island, so that it carries out the FREQUENCY CONTROL of nuclear island side.
In the control system of nuclear power plant's machine class frequency of the embodiment of the invention, frequency contributions mode regulon 20 specifically comprises:
The rotating speed of target acquiring unit is used for mains frequency and changes when causing the turbine speed variation, obtains the rotating speed of target of operator's manual setting;
Speed setting value obtains the unit, is used for rotating speed of target is obtained speed setting value through raising speed rate and Thermal Stress Control;
Rotating speed deviation computing unit is used for calculating the rotating speed deviation of surveying rotating speed and speed setting value;
The steam flow compensation value calculation unit is used for calculating the steam flow offset according to the rotating speed deviation;
Effectively the steam demand amount obtains the unit, is used for the steam flow offset is added to the steam demand amount that calculates under the different mode, obtains effective steam demand amount;
Steam turbine valve aperture reference value amending unit is used for revising positive steam turbine valve aperture reference value according to effective steam demand amount, to change unit generation power, realizes the adjusting of frequency.
In the control system of nuclear power plant's machine class frequency of the embodiment of the invention, frequency control system regulon 30 specifically comprises:
The target load acquiring unit is used for network load and changes when causing the steam turbine frequency fluctuation, obtains given target load; In one embodiment of the present of invention, given target load is given by operator or the central dispatching of master-control room.
The load signal processing unit is used for the load reference value of target load through the restriction acquisition steam turbine of load up speed and Thermal Stress Control;
Load correction value computing unit is used for the load correction value of getting it right and answering according to the rotating speed drift gage;
Effective steam demand amount computing unit, for the actual power power that obtains unit, the difference of calculated load set point and actual load, and process proportional plus integral control computing forms effective steam demand amount;
Steam turbine valve aperture instruction generation unit for generating the instruction of steam turbine valve aperture with the aperture of by-pass valve control after the signal process steam flow restriction that will comprise the steam demand amount and the pressure limit, changes exerting oneself of unit, until frequency retrieval is normal.
Further, the control system of embodiment of the invention nuclear power plant machine class frequency also comprises frequency dead band control unit (not shown), be used for changing or network load changes when causing the steam turbine frequency change at mains frequency, judge that the steam turbine frequency change is whether in default frequency dead band, if, the mode of frequency contributions that then no thoroughfare or the mode of FREQUENCY CONTROL are regulated the machine class frequency, if not, and then according to frequently characteristic curve adjusting of merit machine class frequency.
The embodiment of the invention is by the design of steamer pusher side and nuclear island side FREQUENCY CONTROL scheme, solve nuclear power generating sets and participated in the technical barrier that mains frequency is controlled, by rational frequency modulation dead band parameter is set, drop into the FREQUENCY CONTROL of suitable capacity, both guaranteed the operation that unit safety is stable, guaranteed again that mains frequency changed within the range of permission.The present invention has important directive significance for the selection of electrical network frequency regulation capacity and the setting in frequency modulation dead band.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. the control method of nuclear power plant's machine class frequency is characterized in that, may further comprise the steps:
Judge the load control model of nuclear power plant's unit, described load control model comprises base load control model, automatic Load control model, has the load governor circuit pattern of frequency modulation function and control model that central dispatching is loaded;
If nuclear power plant's unit moves under described base load control model or described automatic Load control model, and mains frequency changes and to cause when turbine speed changes, and regulates the machine class frequency by the mode of frequency contributions;
If nuclear power plant's unit moves having under the load governor circuit pattern of frequency modulation function or the control model that central dispatching is loaded, and network load changes when causing frequency fluctuation, regulates the machine class frequency by the mode of FREQUENCY CONTROL;
The signal of the frequency contributions signal under the transmission frequency contribution mode, the frequency control signal under the frequency control system and the steam turbine valve aperture reference value under the different frequency control mode, the load governor loop input signal with frequency modulation function and the quick load down signal of steam turbine are to the reactor control rod system, so that it carries out FREQUENCY CONTROL.
2. the control method of nuclear power plant according to claim 1 machine class frequency is characterized in that described mode by frequency contributions is regulated the machine class frequency and specifically comprised:
Mains frequency changes and causes when turbine speed changes, and obtains the rotating speed of target of operator's manual setting;
Described rotating speed of target is obtained speed setting value through the restriction of raising speed rate and Thermal Stress Control;
Calculate the rotating speed deviation of actual measurement rotating speed and described speed setting value;
Calculate the steam flow offset according to described rotating speed deviation;
Described steam flow offset is added on the steam demand amount that calculates under the different mode, obtains effective steam demand amount;
According to described effective steam demand amount correction steam turbine valve aperture reference value, to change unit generation power, realize the adjusting of frequency.
3. the control method of nuclear power plant according to claim 2 machine class frequency is characterized in that described mode by FREQUENCY CONTROL is regulated the machine class frequency and specifically comprised:
Network load changes when causing the steam turbine frequency fluctuation, obtains given target load;
Described target load is obtained the load reference value of steam turbine through the restriction of load up speed and Thermal Stress Control;
The load correction value of getting it right and answering according to described rotating speed drift gage;
Described load correction value and described load reference value superposeed form the load setting value;
Obtain the actual power power of unit, calculate the difference of described load setting value and described actual load, and form effective steam demand amount through the proportional plus integral control computing;
The signal that will comprise described steam demand amount is revised steam turbine valve aperture reference value with the aperture of by-pass valve control after through steam flow restriction and pressure limit, and the exerting oneself of change unit is until frequency retrieval is normal.
4. the control method of nuclear power plant according to claim 3 machine class frequency is characterized in that described given target load is given by operator or the central dispatching of master-control room.
5. the control method of nuclear power plant according to claim 4 machine class frequency is characterized in that, also comprises step:
Change or network load changes when causing the steam turbine frequency change at mains frequency, judge that the steam turbine frequency change is whether in default frequency dead band, if, the mode of frequency contributions that then no thoroughfare or the mode of FREQUENCY CONTROL are regulated the machine class frequency, if not, then according to frequently characteristic curve adjusting of merit machine class frequency.
6. the control system of nuclear power plant's machine class frequency is characterized in that, comprising:
Load control model judging unit, be used for judging the load control model of nuclear power plant's unit, described load control model comprises base load control model, automatic Load control model, has the load governor circuit pattern of frequency modulation function and control model that central dispatching is loaded;
Frequency contributions mode regulon moves under described base load control model or described automatic Load control model if be used for nuclear power plant's unit, and mains frequency changes and cause when turbine speed changes, and regulates the machine class frequency by the mode of frequency contributions;
The frequency control system regulon, if being used for nuclear power plant's unit moves having under the load governor circuit pattern of frequency modulation function or the control model that central dispatching is loaded, and network load changes when causing frequency fluctuation, regulates the machine class frequency by the mode of FREQUENCY CONTROL;
Signal transmitting module, be used for the signal of frequency contributions signal, the frequency control signal under the frequency control system and the steam turbine valve aperture reference value under the different frequency control mode under the transmission frequency contribution mode, the load governor loop input signal with frequency modulation function and the quick load down signal of steam turbine to the reactor control rod system, so that it carries out FREQUENCY CONTROL.
7. the control system of nuclear power plant according to claim 6 machine class frequency is characterized in that described frequency contributions mode regulon specifically comprises:
The rotating speed of target acquiring unit is used for mains frequency and changes when causing the turbine speed variation, obtains the rotating speed of target of operator's manual setting;
The tach signal processing unit is used for described rotating speed of target is obtained speed setting value through the restriction of raising speed rate and Thermal Stress Control;
Rotating speed deviation computing unit is used for calculating the rotating speed deviation of surveying rotating speed and described speed setting value;
The steam flow compensation value calculation unit is used for calculating the steam flow offset according to described rotating speed deviation;
Effectively the steam demand amount obtains the unit, is used for described steam flow offset is added to the steam demand amount that calculates under the different mode, obtains effective steam demand amount;
Steam turbine valve aperture reference value amending unit is used for revising positive steam turbine valve aperture reference value according to described effective steam demand amount, to change unit generation power, realizes the adjusting of frequency.
8. the control system of nuclear power plant according to claim 7 machine class frequency is characterized in that described frequency control system regulon specifically comprises:
The target load acquiring unit is used for network load and changes when causing the steam turbine frequency fluctuation, obtains given target load;
The load signal processing unit is used for the load reference value of described target load through the restriction acquisition steam turbine of load up speed and Thermal Stress Control;
Load correction value computing unit is used for the load correction value of getting it right and answering according to described rotating speed drift gage;
Effectively steam demand amount computing unit for the actual power power that obtains unit, calculates the difference of described load setting value and described actual load, and forms effective steam demand amount through the proportional plus integral control computing;
Steam turbine valve aperture instruction generation unit for generating the instruction of steam turbine valve aperture with the aperture of by-pass valve control after the signal process steam flow restriction that will comprise described steam demand amount and the pressure limit, changes exerting oneself of unit, until frequency retrieval is normal.
9. the control system of nuclear power plant according to claim 8 machine class frequency is characterized in that described given target load is given by operator or the central dispatching of master-control room.
10. the control system of nuclear power plant according to claim 9 machine class frequency, it is characterized in that, this control system also comprises frequency dead band control unit, be used for changing or network load changes when causing the steam turbine frequency change at mains frequency, judge that the steam turbine frequency change is whether in default frequency dead band, if the mode of frequency contributions that then no thoroughfare or the mode of FREQUENCY CONTROL are regulated the machine class frequency, if not, then according to frequently characteristic curve adjusting of merit machine class frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210519506.4A CN103036253B (en) | 2012-12-06 | 2012-12-06 | Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210519506.4A CN103036253B (en) | 2012-12-06 | 2012-12-06 | Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103036253A true CN103036253A (en) | 2013-04-10 |
| CN103036253B CN103036253B (en) | 2015-01-28 |
Family
ID=48022870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210519506.4A Active CN103036253B (en) | 2012-12-06 | 2012-12-06 | Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103036253B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425047A (en) * | 2013-09-11 | 2015-03-18 | 中国广核集团有限公司 | Method for preventing thermal power of reactor core from exceeding limiting value in nuclear power plant |
| CN104505134A (en) * | 2014-12-08 | 2015-04-08 | 中广核工程有限公司 | Method and device for coordination control of reactors of nuclear power plant |
| CN104821766A (en) * | 2015-04-29 | 2015-08-05 | 中广核核电运营有限公司 | Nuclear power station half-speed turbine primary frequency modulation control method and control system thereof |
| CN104852653A (en) * | 2015-05-27 | 2015-08-19 | 国网山西省电力公司电力科学研究院 | System for processing frequency signal of thermal generator set |
| CN106532740A (en) * | 2016-10-18 | 2017-03-22 | 上海发电设备成套设计研究院 | Nuclear power steam turbine digital commercial frequency electrohydraulic regulating system with AGC interface function |
| CN107905851A (en) * | 2017-11-15 | 2018-04-13 | 中广核工程有限公司 | Nuclear power system, steam turbine and its heap machine control method for coordinating and device |
| CN107939458A (en) * | 2017-10-24 | 2018-04-20 | 广东核电合营有限公司 | A kind of nuclear power power control system and nuclear power Poewr control method |
| CN108802609A (en) * | 2018-04-16 | 2018-11-13 | 国网福建省电力有限公司 | A kind of primary frequency modulation performance lifting test method considering nuclear power generating sets tolerance |
| CN109488394A (en) * | 2018-10-19 | 2019-03-19 | 哈尔滨汽轮机厂有限责任公司 | The control method that million nuclear steam turbine control system machine heaps are coordinated |
| CN111102018A (en) * | 2019-12-26 | 2020-05-05 | 国电龙源节能技术有限公司 | Control method and control system for preventing over-rated power of low-pressure turbine |
| CN111400843A (en) * | 2018-12-17 | 2020-07-10 | 广西电网有限责任公司电力科学研究院 | Control method of main steam bypass system of pressurized water reactor nuclear power unit |
| CN113187564A (en) * | 2021-05-14 | 2021-07-30 | 博力威格(杭州)科技有限公司 | Control method of three-machine coaxial unit steam turbine |
| CN113675896A (en) * | 2021-08-17 | 2021-11-19 | 华能山东石岛湾核电有限公司 | Method and device for adjusting power transmission power of 'machine-following-pile' mode power grid |
| CN113765119A (en) * | 2020-06-02 | 2021-12-07 | 中国石油化工股份有限公司 | Memory, power grid frequency adjusting method, system, equipment and device |
| CN113833538A (en) * | 2021-08-31 | 2021-12-24 | 中国船舶重工集团公司第七0三研究所 | Operation control method of marine direct-current steam turbine generator unit |
| CN114237312A (en) * | 2021-11-08 | 2022-03-25 | 中国电建集团华东勘测设计研究院有限公司 | Water delivery power generation system valve with non-pressure pipeline mixed connection and unit combined accurate regulation and control method |
| CN114458398A (en) * | 2022-01-27 | 2022-05-10 | 中广核工程有限公司 | Control method, device and equipment for steam turbine valve, steam turbine and medium |
| CN114575939A (en) * | 2022-01-24 | 2022-06-03 | 岭澳核电有限公司 | Method and system for switching steam turbine control modes for nuclear power station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007267496A (en) * | 2006-03-28 | 2007-10-11 | Osaka Gas Co Ltd | Power consumption controller |
| CN102035211A (en) * | 2010-10-26 | 2011-04-27 | 国家电网公司 | Method, device and system for inhibiting low-frequency oscillation of power system |
-
2012
- 2012-12-06 CN CN201210519506.4A patent/CN103036253B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007267496A (en) * | 2006-03-28 | 2007-10-11 | Osaka Gas Co Ltd | Power consumption controller |
| CN102035211A (en) * | 2010-10-26 | 2011-04-27 | 国家电网公司 | Method, device and system for inhibiting low-frequency oscillation of power system |
Non-Patent Citations (1)
| Title |
|---|
| 李端超等: "发电机组一次调频调节效能实时测定及补偿方法", 《电力系统自动化》 * |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425047A (en) * | 2013-09-11 | 2015-03-18 | 中国广核集团有限公司 | Method for preventing thermal power of reactor core from exceeding limiting value in nuclear power plant |
| CN104425047B (en) * | 2013-09-11 | 2018-08-21 | 中国广核集团有限公司 | Core thermal power is prevented in a kind of nuclear power station to transfinite the method for value |
| CN104505134A (en) * | 2014-12-08 | 2015-04-08 | 中广核工程有限公司 | Method and device for coordination control of reactors of nuclear power plant |
| CN104821766B (en) * | 2015-04-29 | 2018-04-24 | 中广核核电运营有限公司 | Nuclear power station half speed steam turbine primary frequency modulation control method and its control system |
| CN104821766A (en) * | 2015-04-29 | 2015-08-05 | 中广核核电运营有限公司 | Nuclear power station half-speed turbine primary frequency modulation control method and control system thereof |
| CN104852653A (en) * | 2015-05-27 | 2015-08-19 | 国网山西省电力公司电力科学研究院 | System for processing frequency signal of thermal generator set |
| CN104852653B (en) * | 2015-05-27 | 2017-05-31 | 国网山西省电力公司电力科学研究院 | Thermal power generation unit frequency signal processing system |
| CN106532740A (en) * | 2016-10-18 | 2017-03-22 | 上海发电设备成套设计研究院 | Nuclear power steam turbine digital commercial frequency electrohydraulic regulating system with AGC interface function |
| CN107939458A (en) * | 2017-10-24 | 2018-04-20 | 广东核电合营有限公司 | A kind of nuclear power power control system and nuclear power Poewr control method |
| CN107939458B (en) * | 2017-10-24 | 2021-05-11 | 广东核电合营有限公司 | Nuclear power control system and nuclear power control method |
| CN107905851A (en) * | 2017-11-15 | 2018-04-13 | 中广核工程有限公司 | Nuclear power system, steam turbine and its heap machine control method for coordinating and device |
| CN107905851B (en) * | 2017-11-15 | 2019-12-03 | 中广核工程有限公司 | Nuclear power system, steam turbine and its heap machine control method for coordinating and device |
| CN108802609A (en) * | 2018-04-16 | 2018-11-13 | 国网福建省电力有限公司 | A kind of primary frequency modulation performance lifting test method considering nuclear power generating sets tolerance |
| CN108802609B (en) * | 2018-04-16 | 2020-12-04 | 国网福建省电力有限公司 | Primary frequency modulation performance improvement test method considering nuclear power unit tolerance capability |
| CN109488394A (en) * | 2018-10-19 | 2019-03-19 | 哈尔滨汽轮机厂有限责任公司 | The control method that million nuclear steam turbine control system machine heaps are coordinated |
| CN111400843A (en) * | 2018-12-17 | 2020-07-10 | 广西电网有限责任公司电力科学研究院 | Control method of main steam bypass system of pressurized water reactor nuclear power unit |
| CN111400843B (en) * | 2018-12-17 | 2022-04-22 | 广西电网有限责任公司电力科学研究院 | Control method of main steam bypass system of pressurized water reactor nuclear power unit |
| CN111102018A (en) * | 2019-12-26 | 2020-05-05 | 国电龙源节能技术有限公司 | Control method and control system for preventing over-rated power of low-pressure turbine |
| CN111102018B (en) * | 2019-12-26 | 2022-05-06 | 国电龙源节能技术有限公司 | Control method and control system for preventing over-rated power of low-pressure turbine |
| CN113765119A (en) * | 2020-06-02 | 2021-12-07 | 中国石油化工股份有限公司 | Memory, power grid frequency adjusting method, system, equipment and device |
| CN113187564A (en) * | 2021-05-14 | 2021-07-30 | 博力威格(杭州)科技有限公司 | Control method of three-machine coaxial unit steam turbine |
| CN113675896A (en) * | 2021-08-17 | 2021-11-19 | 华能山东石岛湾核电有限公司 | Method and device for adjusting power transmission power of 'machine-following-pile' mode power grid |
| CN113833538A (en) * | 2021-08-31 | 2021-12-24 | 中国船舶重工集团公司第七0三研究所 | Operation control method of marine direct-current steam turbine generator unit |
| CN113833538B (en) * | 2021-08-31 | 2024-05-17 | 中国船舶重工集团公司第七0三研究所 | Operation control method of marine direct-current steam turbine generator unit |
| CN114237312A (en) * | 2021-11-08 | 2022-03-25 | 中国电建集团华东勘测设计研究院有限公司 | Water delivery power generation system valve with non-pressure pipeline mixed connection and unit combined accurate regulation and control method |
| CN114237312B (en) * | 2021-11-08 | 2023-09-19 | 中国电建集团华东勘测设计研究院有限公司 | Valve of water transmission and power generation system with and without pressure pipeline mixed connection and unit combined accurate regulation and control method |
| CN114575939A (en) * | 2022-01-24 | 2022-06-03 | 岭澳核电有限公司 | Method and system for switching steam turbine control modes for nuclear power station |
| CN114575939B (en) * | 2022-01-24 | 2023-09-26 | 岭澳核电有限公司 | Method and system for switching control modes of steam turbine for nuclear power station |
| CN114458398A (en) * | 2022-01-27 | 2022-05-10 | 中广核工程有限公司 | Control method, device and equipment for steam turbine valve, steam turbine and medium |
| CN114458398B (en) * | 2022-01-27 | 2023-11-03 | 中广核工程有限公司 | Control method and device for steam turbine valve, control equipment, steam turbine and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103036253B (en) | 2015-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103036253B (en) | Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency | |
| CN109494762B (en) | Photovoltaic power station primary frequency modulation control method and system based on multi-master station coordinated control | |
| CN107317345B (en) | Method for controlling frequency of isolated power grid by participation of electrolysis load | |
| CN102437809B (en) | Method for controlling speed regulating system of hydroelectric unit in island mode | |
| US9236742B2 (en) | Method and control arrangement for controlling a reactive power source | |
| CN109103893A (en) | A kind of cluster temperature control load participates in the auxiliary frequency modulation method of power grid AGC | |
| CN105826936B (en) | A kind of fired power generating unit intelligence primary frequency modulation control method for power grid large frequency-difference | |
| CN108695897B (en) | Power control method, device, controller, system and medium for photovoltaic power station | |
| CN101777764B (en) | Area control deviation and unit generation deviation-based scheduling feedback control system | |
| CN105490292B (en) | A kind of energy-storage system participates in the method and device of electric grid secondary FREQUENCY CONTROL | |
| CN102222906A (en) | Laminated and partitioned automatic current control method applicable to multi-target power grid | |
| CN106499452A (en) | Lift the control method and system of adjustment extraction turbine group primary frequency modulation compensation ability | |
| CN105870943A (en) | Primary frequency modulation control system and method applied to thermal power generating unit and based on safe and stable operation | |
| CN105785859A (en) | Optimization control system and method ensuring primary frequency modulation motion under AGC mode of thermal power generating unit | |
| CN103746408A (en) | AGC (Automatic Generation Control) coordination control method of large-scale wind power | |
| CN105896616B (en) | Consider that new energy receives maximized fired power generating unit Real-Time Scheduling demand determination method | |
| CN104158199B (en) | Power system real-time status is carried out the system and method for reactive power and voltage control | |
| CN112838603B (en) | Wind-solar energy storage and pumping multi-source energy AGC coordinated complementary control method and device | |
| CN101917002B (en) | Ultrahigh voltage power network interconnection line operating state-based voltage control method | |
| CN103618308B (en) | Alternating current line power flow automatic control method of alternating current and flexible direct current parallel power transmission system | |
| CN103904694B (en) | A kind of multizone coordinates automatic power generation control method and system | |
| CN105244923A (en) | Double-fed wind turbine generator set-based wind farm reactive power control method | |
| CN104037788A (en) | Wind fire bundling system control device and method thereof | |
| CN208723557U (en) | Primary frequency modulation Optimal Control System based on power grid frequency difference | |
| CN103151795A (en) | Scattered-type wind power plant reactive power optimization control method capable of reducing fan losses and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518023 No. 69 Shennan Middle Road, Shenzhen, Guangdong, Futian District Co-patentee after: CHINA GENERAL NUCLEAR POWER Corp. Patentee after: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. Address before: 518023 No. 69 Shennan Middle Road, Shenzhen, Guangdong, Futian District Co-patentee before: CHINA GUANGDONG NUCLEAR POWER GROUP Co.,Ltd. Patentee before: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |